The Outdoor Research DryComp Ridge Sack features a durable waterproof fabric with radio frequency welded seams and a roll-top closure to protect your gear on the approach. The compression straps of the DryComp Ridge Sack easily convert to shoulder straps and a waist belt, transforming it into a summit sack! The ergonomic design fits flat against your back. A mesh pocket accommodates a hydration bladder and stretch cording and gear loops secure crampons and ice tools. Compression straps cinch your load down and breathable mesh shoulder straps combine to offer a comfortable fit for alpine climbing and peak bagging. The Outdoor Research DryComp Ridge Sack is a dry sack/summit sack that has all the features needed for a fast and light summit push.