used for a week-long winter trip
from the website:
Alpine protection and all-night comfort without the weight. Lightweight durability of Pertex® and breathable waterproof AscentShell™ makes for a faster and lighter solo shelter that you’ll bring everywhere. The tapered shape of the Alpine AscentShell Bivy works best with tapered shape sleeping pads with narrower dimensions at the foot, ideally 22” or narrower.