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 simply 3L making it good for journeys the place pack area is at a premium. The insulation is zoned with 70% on high and 30%, leveraging your sleeping pad insulation for heat. What’s the catch? It has a tapered minimize with restricted girth, however when 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)
• Building: Field Baffled
• Girth/Hips/Footbox (measurement common): 57″, 49.5″, 43″
• Insulation: 900 Fill Goose Nikwax Hydrophobic Down RDS
• Zipper: Half-Zipper
• Zipper Aspect: 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 high and 30% beneath you, leveraging the chilly resistance of your sleeping pad to maintain you heat. If you happen to roll over onto your aspect, you’ll sleep a lot colder than when you sleep in your again with the majority of the goose-down insulation on high of your torso. To stop this, the Hyperion 20 comes with non-compulsory sleeping pad straps that connect with loops on the again of the bag. These act equally to quilt-pad attachment straps to maintain you in your sleeping pad at evening.

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 sort of tapered and is designed to suit you with out quite a lot of further inside area. I can match into its 57″ shoulder girth (measurement common) however there isn’t an entire lot of additional room for me inside from my waist up. The footbox is quite spacious, nevertheless, and my ft can simply splay aside comfortably.

The Hyperion is insulated with 900 fill energy Nikwax waterproof goose down which is premium stuff by way of 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 could be discovered on the higher half of the zipper. The 2-way zipper makes it potential to vent the bag to a sure extent, though not within the footbox. If you happen to get habitually sizzling ft or it is advisable camp in extremely popular/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 need to deal with it gently to forestall it from tearing. The anti-snag tape alongside the zipper draft tube helps forestall rips, however you’ll need to watch out with it however.

The hood is a reasonably normal mummy hood with a right-side management to allow you to cinch the hood closed. It doesn’t have area for a pillow or something, however it’ll transfer with you when you roll over like a jacket. A snap on the high of the aspect zipper helps seal the hood on the left aspect and preserve its form even when the aspect zipper shouldn’t be 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 area and weight are a premium. It’s by far one of many lightest sleeping out there right now however it’s a cosy match, tougher to vent, and finest utilized in cooler temperatures quite than sizzling and humid ones. A 32-degree mannequin can also be out there.

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

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