The newest and lightest Hyperion in the range is a WORLD EXCLUSIVE to us here at Ultralight. Sticking to the design this is an ultra lightweight and packable mummy sleeping bag for summer camping and backpacking. One of the lightest bags available, the 900-fill, water-resistant Nikwax Down sleeping bag keeps you warm and comfortable.
The Hyperion 45F/7C sleeping bag is among the lightest in its class while still providing high-performance during backcountry pursuits. The bag uses thermally-efficient box baffled construction in key areas to ensure warmth and comfort during backcountry pursuits. Designed with high-quality materials and Therm-a-Rest performance features like SynergyLink™ Connectors, the Hyperion keeps your pack featherweight without sacrificing an ounce of performance. Storage sack and compression stuff sack included.
Therm-a-Rest's Hyperion 45 Down Sleeping Bag is a world exclusive for us. This is the lightest and most compact bag Thermarest have produced and there was only one place they wanted to sell it. Building on the success of the Hyperion range this 45 version weighs just 370g and has a comfort limit of 7°C. This outstanding warmth to weight ratio is achieved by using the highest quality responsibly sourced down expertly zoned in a box wall construction. The bag is lined with ThermaCapture to trap body heat keeping you nice and toasty.
The bag only has a half length zip which saves weight and increases warmth but reduces venting ability. The bag comes with tiny (potentially flimsy) straps to attach the bag to a sleeping mat to reduce the chance of you wriggling off your mat in the night. These can be removed if you want to save a few grams. As you would expect with such a lightweight bag the pack size is very small.
- Reviewed by Ultralight Outdoor Gear
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