Laurel Worthenwrote a review of Therm-a-Rest Hyperion Sleeping Bag: 20 Degree Down on August 27, 2019
Familiarity: I've used it once or twice and have initial impressions
Great for those summer nights when you sleep outside but a blanket just won't do to keep you warm. I was seriously blown away at how toasty this tiny thing got! Didn't need to wear any extra layers to bed when I hit the sack at night. Packs down very small if you are limited on space which is always a plus!