Therm-a-Relaxation Hyperion Sleeping Bag Evaluate [2022] BikeHikeSafari

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It is a gear overview concerning the Therm-a-Relaxation Hyperion Sleeping Baggage in 2022. The sleeping bag overview covers the entire Therm-a-Relaxation Hyperion Sleeping Bag Vary however I’ve targeted on the Therm-a-Relaxation Hyperion 20F/-6C which I’ve extensively examined and reviewed.

In relation to ultralight sleeping luggage the Therm-a-Relaxation Hyperion vary has been the king since its introduction within the spring of 2019. However do you have to purchase it? I’ve spent over 2500 nights sleeping in sleeping luggage through the years and have examined many luggage through the years, together with the Hyperion from Therm-a-Relaxation. So this in-depth overview will let whether it is for you.

All of the Therm-a-Relaxation Hyperion Sleeping Baggage use high-quality 900+ Nikwax Hydrophobic down, ultralight 10D material on the interior and outer shell, with the outer material coated with a DWR. Because the lightest sleeping bag of their class, Ultralight Via-Hikers and Backpackers have lots of causes to love the Hyperion sleeping luggage.

Hold studying to search out out extra.

Therm-a-Relaxation Hyperion Sleeping Bag Specs

Therm-a-Relaxation Hyperion 20F/-6C

Therm-a-Rest Hyperion 20F

Weight: 20 oz / 567 grams
Down Fill Energy:
Hyperdry 900 fill
Fill Weight:
11.5 oz / 330 grams
EN / ISO Rated:

> Ultralight
> Very compact
> Excessive-quality down
> Nice for again and aspect sleepers
>Very small inner dimensions could make for a good match
>Not the very best for abdomen sleepers

Therm-a-Relaxation Hyperion 32F/0C

Weight: 16 oz / 460 grams
Down Fill Energy:
Hyperdry 900 fill
Fill Weight:
8.5 oz / 250 grams
EN / ISO Rated:

> Extraordinarily Ultralight
> Smallest Pack Measurement in Class
> Excessive-quality down
> Nice for again and aspect sleepers
>Very small inner dimensions could make for a good match
>Not the very best for abdomen sleepers

Therm-a-Relaxation Hyperion Ultralight Sleeping Baggage

The Therm-a-Relaxation Hyperion was first launched within the Spring of 2019. The ultralight Therm-a-Relaxation Hyperion Sleeping Bag vary turned a hit as they chased the ultralight sleeping bag market. As soon as upon a time, ultralight backpackers and thru-hikers have been seen as freaks who compromised sturdiness and security whereas chasing decrease ounces and grams. Now ultralight is mainstream and accessible to all. And the Hyperion vary is unashamedly focused on the backpacker who desires the lightest doable sleeping bag with the very best doable high quality.

Therm-a-Relaxation has seen no must make any adjustments since that point as it’s nonetheless probably the greatest ultralight sleeping luggage available on the market.

The temperatures of the baggage have been independently examined to EN/ISO requirements. The sleeping bag normal, ISO 23537, was launched as the brand new sleeping bag normal. The temperature scores on the Hyperion sleeping luggage have been examined to this normal. Personally, I like this dedication to making sure the sleeping bag scores are independently examined slightly than a greatest guess on how heat you need to be like some corporations do. Extra on the temperature scores a little bit later.

Down kind/fill energy

The Therm-a-Relaxation Hyperion Sleeping Baggage are stuffed with 900+ loft Hyperdry Goose Down in 2022. That is the top-of-the-range down used on any Therm-a-Relaxation Sleeping Bag. It’s not solely ultra-lightweight but in addition has good water resistance qualities as they use Nikwax water repellent down. This implies in case you are unlucky sufficient to search out your self in very unhealthy climate and your sleeping bag will get moist, it won’t take up as a lot water as different sleeping luggage and nonetheless be capable to loft and maintain you heat.


Let’s check out how the Therm-a-Relaxation Hyperion Sleeping Baggage are made with the options such because the Interior and Outer Shell materials, zippers, baffles, draft tubes, hood, and climate resistance.

Outer Shell material

The exterior face material of the Therm-a-Relaxation Hyperion Sleeping Bag is made utilizing a 10-Denier Ripstop Nylon which is coated with a DWR coating to forestall drops of water from getting into the bag. Like nearly all fashionable ultralight sleeping luggage, the material mild and nearly see-through, particularly while you maintain it as much as the sunshine.

When testing the Therm-a-Relaxation Hyperion Sleeping Baggage I poured a major quantity of water on the outer material to check the water resistance of the material and the water beaded properly and ran off the material. Extra on that later.

Interior material

The Therm-a-Relaxation Hyperion Sleeping Baggage use the identical 10 Denier material that’s used on the outer shell minus the DWR coating. It’s not solely ultralight but in addition resistant to ripping.

I did the rip check on the material through the use of my palms to attempt to rip the material, even across the stitching space. I used to be unable to tear it. With a pointy object or knife, I might reduce the material simply however I don’t wish to deliberately destroy this superior sleeping bag.

Climate resistance

As talked about above, I did drop fairly a little bit of water on the outer face material to check the water repellency and high quality of the DWR coating. I can affirm it can present an honest degree of water resistance that’s no less than equal to or higher than all of the competitors within the Ultralight Sleeping Bag market.

The Therm-a-Relaxation Hyperion Sleeping Bag is nice sufficient to sleep exterior underneath the celebs when condensation comes down in a single day.

Disclaimer: I don’t suggest that you simply pour a complete bottle of water over your sleeping bag to check its water resistance. I do the testing so simply how good or unhealthy this product is.

Therm-a-rest Hyperion Sleeping Bag water resistant DWR coating


The Hyperion Sleeping luggage use a system of baffles which are a little bit totally different from different sleeping luggage available on the market. Whereas the field baffles are not any totally different from many different sleeping luggage, they stuff 70% of the down into the highest layer and 30% within the backside layer. What which means is the layer that’s going through down onto the sleeping pad has much less insulation and the highest layer does all of the work of retaining you heat.

In idea, this technique is nice. However there may be one concern. What occurs while you roll over at night time the 70% of the insulation is on the underside? Properly, if this happens you’ll not keep as heat. To fight this, the Hyperion Sleeping Baggage have a strap system that they prefer to name, SynergyLink Connectors that join the sleeping bag to the sleeping pad and forestall this from taking place.

When testing this technique I discovered it to work surprisingly properly. Anybody who has used an ultralight backpacking quilt will likely be acquainted with such a system, however sleeping bag house owners should not so acquainted with such a system. The sleeping bag stayed in place properly sufficient for me to roll round within the bag and never induce the underside aspect of the bag with much less down to maneuver to the highest. Whereas aspect sleeping the bag turned simply sufficient for me to be very comfy and never have the hood cowl my mouth.

Like most ultralight sleeping luggage, I might have preferred every baffle to be filled with barely extra down. Not like an overfill, however sufficient to cut back clumping of the down which occurs over time and is a sign that the sleeping bag is in want of a wash. The truth is, it can must be completed occasionally to maintain the bag acting at its greatest.

The SynergyLink Connectors keep the Thermarest Hyperion Sleeping Bag in place.
The SynergyLink Connectors maintain the Therm-a-Relaxation Hyperion Sleeping Bag in place.

Zips and Draft Tube

The Hyperion sleeping bag sequence contains a 1/2-length zip and a draft tube.

I attempted my greatest to destroy the zip and tried to snag it on the inner draft collar. I used to be capable of snag the zip once I tried however for most individuals, there may be nothing to fret about. There’s a little bit of a studying curve in relation to utilizing the zip and locking it in place with the press stud subsequent to the hood. After I say that, the bag is a good match and is fiddly to shut. After a couple of makes an attempt, it isn’t a problem, and after just one night time of use, it’s simple sufficient to make use of.

Total, the zips and draft tubes do a very good job and there may be not a lot that may be faulted. However because of the tight inner dimensions of the Hyperion sleeping luggage, I discovered it could possibly be a problem to zip up the bag with out making certain I used to be tucked inside completely. With follow, it turned simpler.

Therm-a-rest Hyperion Sleeping Bag snag free zips


The hood on the Hyperion is nice and contains a full collar the entire approach round. It’s a very tight match and in contrast to many different sleeping luggage, it won’t be doable to sleep along with your backpacking pillow contained in the hood. The hood is simply too tight a match for that. In case you use a backpacking pillow it should be exterior the hood. This isn’t a giant concern however one thing you should pay attention to. That very same compact dimension of the hood ensures there should not many air pockets that take power to warmth, power that’s higher spent retaining you heat.

The Drawcords and toggles used to cinch the hood closed all work as anticipated and won’t be a problem for customers.

The neck and hood collars could possibly be a little bit larger and will have extra overfilled for higher warmth retention. In my expertise the hood collar and neck collar areas of sleeping luggage are the primary locations to get soiled from physique oils and sweat which ends up in the down changing into extra compressed and clumped, making them much less environment friendly at retaining you heat.

After I examined the Therm-a-Relaxation Hyperion Sleeping Bag I spent lots of time sleeping on my aspect and rolling over rather a lot. The hood labored completely and was capable of transfer with me as I turned, even when utilizing the straps to carry the sleeping bag onto the ultralight sleeping pad. I used the Therm-a-Relaxation Uberlite sleeping pad when testing this sleeping bag. I might discover no higher ultralight sleeping system than this.

As talked about above, perhaps a bit extra overfill within the hood and draft collars could be a very good enchancment. And I barely bigger match could be good. However as that is such a distinct segment ultralight bag I’m not certain that’s one thing that Therm-a-Relaxation will ever do as it may possibly solely add extra weight to the bag.

Therm-a-rest Hyperion Sleeping Bag compact hood

Stuff Sack

The usual Stuff Sack provided with the Hyperion Sleeping Baggage is nice and there’s no want for anybody to contemplate upgrading to anything. It’s light-weight and will be compressed with the aspect straps to compress the baggage into a really small dimension of round 2.5L. The truth is, the Hyperion is essentially the most compressible sleeping bag in its class of ultralight sleeping luggage. Others might come shut however that is the very best, solely ultralight hoodless sleeping luggage or backpacking quilts are extra compact.


As talked about above the stuff sac will compress the bag to a smaller dimension. Consult with the Specification chart for detailed comparisons.


The Therm-a-Relaxation Hyperion Sleeping Baggage are essentially the most packable of all of the ultralight sleeping luggage of their class. A mix of the excessive loft down, 10D material, and compact zip all contribute to the small pack dimension.

Therm-a-rest Hyperion Sleeping Bag stuff sack size


The interior sizing of the Therm-a-Relaxation Hyperion Sleeping Baggage is on tight dimension. There may be not lots of room to maneuver round inside in comparison with different ultralight sleeping luggage. There are professionals and cons of tight mummy-style sleeping bag sizing.

Though the Hyperion fashions are traditional mummy-style sleeping luggage, they’ve very compact inner dimensions. The truth is, their inner dimension are one of many smallest of their class. These compact inner dimensions permit for a better means to maintain you heat as you waste much less power retaining air pockets heat. In consequence, Therm-a-Relaxation can add much less down into the bag and use much less material in a lighter bag. All of it is a optimistic while you need an ultralight sleeping bag.

The tight inner dimensions have some destructive points that must be highlighted. If you wish to put on a winter-grade down jacket when you sleep it can make for a good match. This is usually a draw back if you wish to lengthen the temperature vary of the baggage throughout the shoulder seasons. Having mentioned that, they may match an insulated sleeping bag liner with out concern, in order that may be a greater possibility for shoulder season journey. In case you get chilly toes, you could possibly put on a pair of down booties contained in the sleeping bag to remain heat.

After I examined the sleeping bag I discovered that the SynergyLink Connectors did a very good job of retaining the sleeping bag going through up. When sleeping on my again the Hyperion Bag was nice, excellent. After I rolled over and slept on my aspect it was surprisingly good. I assumed it would casue a problem however it didn’t.

After I slept on my again, which I generally tend to do occasionally, I discovered myself caught contained in the hood. That is my solely criticism of this bag simply pay attention to this. A abdomen sleeper can have a problem with this bag. Having mentioned that, most individuals not often sleep of their abdomen, so for most individuals, the compact dimension and ultralight weight will likely be value it.

Total, the Therm-a-Relaxation Hyperion Sleeping Baggage are tight-fitting sleeping luggage on account of their inner dimensions. In case you are obese, look elsewhere, this bag won’t give you the results you want. In case you are of common construct or smaller then this could possibly be the right ultralight sleeping bag.

Side Sleeping in the Therm-a-Rest Hyperion 20F/-6C Sleeping Bag
Facet Sleeping within the Therm-a-Relaxation Hyperion 20F/-6C Sleeping Bag. Be aware how the bag will nonetheless work nice when aspect sleeping


When testing the bag I discovered the temperature ranking to be true to these said by Therm-a-Relaxation. Each the Hyperion 20F/-6C and Hyperion 32F/0C sleeping luggage have been examined to EN and ISO requirements so you’ll be able to relaxation assured that the sleeping bag will maintain you heat on the temperatures as reported.

I’m usually a barely chilly sleeper except I ate a really heavy meal earlier than going to mattress (which might maintain you hotter at night time). I’m a aspect sleeper on the whole and I discovered the bag to work properly when sleeping on my aspect however not so good when sleeping on my again.

It’s tremendous necessary to notice that there are 3 temperature scores listed on every sleeping bag.

The Therm-a-Relaxation Hyperion Sleeping Baggage have the next EN /ISO permitted sleeping bag scores:

Therm-a-Relaxation Hyperion 32F/0C Sleeping Bag:

Consolation: 41F/5C
Transition: 32F/0F
Danger: 5F/-15C

Therm-a-Relaxation Hyperion 20F/-6C Sleeping Bag:

Consolation: 32F/0C
Transition: 20F/-6C
Danger: -9F/-23C

Consolation Ranking

The Consolation Ranking is a very powerful ranking as that is the temperature at which you’ll be heat and will sleep properly. Sadly, the sleeping bag trade as a complete fails to make use of this ranking for advertising causes. However use this as your base for what bag will maintain you heat at what temperature.

That is normally the temperature at which a girl will sleep properly with out being chilly.

Restrict Ranking

The Restrict Ranking is utilized by nearly all sleeping bag producers because the temperature ranking for the sleeping bag. Few folks will get a very good night time’s sleep on the restrict ranking except they know their our bodies properly sufficient to know they’re heat sleepers.

I do know myself properly sufficient to know I’m normally midway between the Consolation and Restrict Ranking of an authorized EN/ISO examined sleeping bag. That is my very own private ranking of how heat I will likely be at night time inside a bag.

That is normally the temperature ranking {that a} male, curled up on his aspect, will sleep OK. Most individuals will really feel chilly and never sleep properly when sleeping on the restrict ranking temperatures.

Excessive Restrict

The Excessive Restrict is the restrict inside which individuals won’t die from hypothermia or excessive chilly. You will be assured that in case you use the bag on the Excessive Restrict you’ll stay awake in any respect. If going into the Excessive Restrict make sure to get a Thermal Sleeping Bag Liner and even higher improve to a 4 Season Winter Sleeping Bag.

Therm-a-rest Hyperion Sleeping Bag temperature rating


As talked about above the sleeping bag is comparatively comfy for everybody besides when sleeping in your abdomen. The interior dimensions of those ultralight sleeping luggage are:

Therm-a-Relaxation Hyperion 20F/-6C:
Size, Width & Top: 80 x 28.8 x 4.5 inches / 203 x 72 x 11.5cm (appropriate for an individual as much as 72 inches 183 cm)
Inner Dimension: 57 x 49.5 x 43 inches / 145 x 126 x 109 cm

Therm-a-Relaxation Hyperion 32F/0C:
Size, Width & Top: 80 x 28.8 x 4 inches / 203 x 72 x 10cm (appropriate for an individual as much as 72 inches 183 cm)
Inner Dimension: 57 x 49.5 x 43 inches / 145 x 126 x 109 cm

Caring in your Therm-a-Relaxation Sleeping Bag

When you may have a high-quality sleeping bag it’s value taking care to take care of it. Among the best issues you are able to do is put on clear backpacking base layers to mattress to forestall sweat, filth, and physique oil from penetrating the liner of the sleeping bag. It’s also possible to use a sleeping bag liner to maintain it clear.

The best way to retailer your Therm-a-Relaxation sleeping bag

The Therm-a-Relaxation Hyperion comes with a Lofting bag included which is an honest dimension and definitely ok to maintain lots of the loft when storing it at residence. In contrast with different manufacturers it is without doubt one of the higher lofting luggage. I like them massive and oversize when storing my sleeping bag.

Therm-a-rest Hyperion Sleeping Bag loft bag

The best way to wash your Therm-a-Relaxation Sleeping Bag

Over time the sleeping bag will lose a little bit of its loft and it’s possible you’ll begin to complain that the bag is not so good as it was. Down might begin to clump collectively and it would begin to have some funky smells that appear to be a cross between a sweaty gymnasium and an unwashed homeless particular person. If this happens it’s time to give the sleeping bag a wash. I wrote an article on how to do that so check out The best way to Wash a Down Sleeping Bag, for additional particulars on learn how to wash your bag.


The Therm-a-Relaxation Hyperion sequence are premium Sleeping Baggage at a premium value. Having mentioned that, they sit on the higher finish of the premium ultralight sleeping luggage market in 2022.

Whereas not low-cost, in case your objective is to have an ultralight againpacking gear setup then this is without doubt one of the greatest choices.

Therm-a-Relaxation Hyperion Vs The Relaxation

How does the Therm-a-Relaxation Hyperion examine to different Sleeping Baggage within the ultralight class in 2022? Take a look at my full comparability overview of the Therm-a-Relaxation Hyperion and all of the Greatest Ultralight Sleeping Baggage 2022.

Greatest Suited Use

The Therm-a-Relaxation Hyperion Sleeping Baggage could be excellent for anybody who’s sleeping in temperatures above freezing or barely beneath within the case of the Hyperion 20F/-6C. The next forms of journeys could be excellent for this bag.

  • Via-hiking wherever besides on the coldest of trails. If beginning early or ending late on the Appalachian Path, you could possibly add an insulated sleeping sheet liner and put on garments to mattress. Excellent for ultralight via mountain climbing on the Pacific Crest Path.
  • Summer season mountain climbing within the Rockies or Sierra in North America with the Hyperion 20F/-6C. Or into the Spring and Fall if utilizing the hotter Hyperion 20F/-6C.
  • Summer season mountain climbing within the Alps in Europe or Mountain climbing the Camino in Spain. The hotter luggage will likely be properly suited to three season journeys in most locations.
  • Summer season mountain climbing and 3-season mountain climbing in Australia and New Zealand in most areas.
  • Summer season journeys in South America together with Patagonia so long as the nighttime temperatures are above freezing. You will want the Hyperion 20F/-6C if heading to the Excessive Andes of Bolivia, Peru, and Ecuador, and perhaps even an insulated sleeping bag liner for further heat when wanted. I examined this bag within the mountains and coastal vary of Chile, excellent.


The Therm-a-Relaxation Hyperion sleeping luggage are greatest suited to anybody wanting a high-quality ultralight sleeping bag. The temperature ranking for this bag is true to the specification for my part and based mostly on my use of the sleeping bag.

If you’d like a sleeping bag for the summer time months and into the shoulder season for hotter climates then this could possibly be for you. Simply be sure you should not obese or your physique will not be too giant. It is a tight-fitting sleeping bag.

In relation to enhancements, I wish to see the sleepings improve within the inner dimensions of the bag barely. Not by a lot, however by sufficient so I can use the sleeping bag with a down jacket or puffy jacket and nonetheless have a little bit of room to roll round. Simply 2 inches of inner dimension improve would make this bag excellent for me. Although it isn’t suited to abdomen sleepers, I feel the compromise of including much less right down to the underside of the bag is a good thought to maintain the load down.

Total, the Therm-a-Relaxation Hyperion vary of sleeping luggage is without doubt one of the lightest sleeping luggage available on the market in 2022. There may be little to fault, and never a lot that wants enhancing. In case you are an ultralight backpacker or thru-hiker, this could possibly be your subsequent sleeping bag.

Evaluate Costs: to be up to date

Are Therm-a-Relaxation Sleeping Baggage any good?

Therm-a-Relaxation Sleeping Baggage are very prime quality and ultralight. The Therm-a-Relaxation Hyperion vary is understood to be a number of the lightest sleeping luggage available on the market proper now.

Does Therm-a-Relaxation Sleeping Baggage use Responsibly Sourced Down?

Sure, All of the down sleeping luggage from Therm-a-Relaxation are RDS licensed, ethically sourced down that may be traced as responsibly sourced.

Thermarest Hyperion Sleeping Bag Review Pin

BikeHikeSafari Gear Evaluate Course of

The creator, Brad McCartney from BikeHikeSafari is a small unbiased adventurer and outside gear tester who owns and runs

BikeHikeSafari will not be half of a big weblog community like many different outside gear overview websites and all evaluations on this website are unbiased and sincere evaluations of out of doors merchandise by the creator.

The creator, Brad McCartney is a really skilled triple crown thru-hiker, adventurer, and bike tourer having spent 1000s of nights sleeping in a tent and sleeping bag (Learn extra). He additionally used to handle an outside retail retailer and may be very skilled in what’s necessary when utilizing and testing gear for evaluations like this.

BikeHikeSafari won’t ever obtain any cash for evaluations and doesn’t settle for sponsored evaluations on this web site. All of the feedback on this overview are from the creator based mostly on his years of expertise. Hope this unbiased overview was useful to you.

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