Therm-a-Relaxation Hyperion 20 Sleeping Bag Evaluation

The Therm-a-Relaxation Hyperion 20 is an ultralight down sleeping bag designed for again sleepers that weighs 20 ounces (1 lb 4 oz) and is insulated with 900 fill energy waterproof down. It has a box-baffled development to remove chilly spots and a half-length zipper to avoid wasting weight. When stuffed the Hyperion 20 packs down to only 3L making it good for journeys the place pack house is at a premium. The insulation is zoned with 70% on prime and 30%, leveraging your sleeping pad insulation for heat. What’s the catch? It has a tapered lower with restricted girth, however in the event you can match inside comfortably, it’s a candy ultralight sleeping bag.

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Specs at a Look

• Gender: Unisex
• Weight: 20 oz (1 lb 4 oz) – Measurement Medium, Size 72″
• Fill Weight: 12.5 oz
• Sizes: S, M, L
• Kind: Mummy
• Packed Measurement: 3L
• EN Consolation Temperature Score: 32F (-6C)
• EN Restrict Temperature Score: 20F (-23C)
• Development: Field Baffled
• Girth/Hips/Footbox (measurement common): 57″, 49.5″, 43″
• Insulation: 900 Fill Goose Nikwax Hydrophobic Down RDS
• Zipper: Half-Zipper
• Zipper Facet: Left
• Draft Tube: Sure
• Shell/Liner Material: 10D Nylon RipStop with DWR / 10D Nylon RipStop
• Stuff Sack: Compression sack included and a fabric storage bag
• Go to Therm-a-Relaxation for full Specs

Zoned Insulation

The Hyperion 20 sleeping bag is a backpacking and mountaineering mummy-style sleeping bag designed for again sleepers. I can’t emphasize the latter extra. The insulation is distributed in a zonal style with 70% on prime and 30% beneath you, leveraging the chilly resistance of your sleeping pad to maintain you heat. If you happen to roll over onto your facet, you’ll sleep a lot colder than in the event you sleep in your again with the majority of the goose-down insulation on prime of your torso. To stop this, the Hyperion 20 comes with optionally available sleeping pad straps that hook up with loops on the again of the bag. These act equally to quilt-pad attachment straps to maintain you in your sleeping pad at night time.

Ultralight Design Options

At simply 20 oz, how did Therm-a-Relaxation make this sleeping bag so light-weight?

First off, the sleeping bag is kind of tapered and is designed to suit you with out numerous additional inside house. I can match into its 57″ shoulder girth (measurement common) however there isn’t a complete lot of additional room for me inside from my waist up. The footbox is somewhat spacious, nevertheless, and my toes can simply splay aside comfortably.

The Hyperion is insulated with 900 fill energy Nikwax waterproof goose down which is premium stuff when it comes to warmth-to-weight ratio. Greater fill energy down like this offers extra heat by weight than decrease fill energy down and is used to avoid wasting weight.

Whereas the Hyperion 20 has a two-way zipper, it’s solely half-length, so it ends at my knees: this protects weight by eliminating the necessity for an extended zipper, draft tube, and anti-snag taping, which might be discovered on the higher half of the zipper. The 2-way zipper makes it attainable to vent the bag to a sure extent, though not within the footbox. If you happen to get habitually sizzling toes or it’s essential camp in highly regarded/humid climate, I’d get a distinct sleeping bag with a full-length zipper as a substitute.

The light-weight 10d ripstop nylon material on the Hyperion is considerably delicate and also you’ll wish to deal with it gently to forestall it from tearing. The anti-snag tape alongside the zipper draft tube helps stop rips, however you’ll wish to watch out with it however.

The hood is a reasonably commonplace mummy hood with a right-side management to allow you to cinch the hood closed. It doesn’t have house for a pillow or something, however it would transfer with you in the event you roll over like a jacket. A snap on the prime of the facet zipper helps seal the hood on the left facet and preserve its form even when the facet zipper is just not absolutely closed.

Advice

The Therm-a-Relaxation Hyperion 20 is an ultralight sleeping bag designed for again sleepers preferring the draft-free efficiency of a sleeping bag over a backpacking quilt. Weighing 1 lb 4 oz, it’s optimized for backpacking journeys the place house and weight are a premium. It’s by far one of many lightest sleeping obtainable right now but it surely’s a cosy match, tougher to vent, and finest utilized in cooler temperatures somewhat than sizzling and humid ones. A 32-degree mannequin can also be obtainable.

Disclosure: Therm-a-Relaxation donated a sleeping bag for assessment.

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