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The Sierra Designs Nitro brings back the classic mummy shape at an impressively low weight, yet comfortable price.
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This bag is a bit roomier than a traditional mummy bag and still packs down small and is extremely lightweight. The footvent comes in really handy since the sleeping bag is so warm and I never noticed cold air creeping in when not in use. Just got back from a trip to Everest Base Camp and this kept me toasty the entire trek. Even at higher elevations approaching single digits, I never wore more than a pair of shorts when sleeping. Jeff on May 26th 2018
The construction is very nice and comfy. The added foot cooler is nice. I looked up the traceable down and found out it was 930 fill! -Super stoked for the price and can't be beat. JH on May 14th 2018