The Outdoor Research DryComp Ridge Sack is an ultralight and waterproof day pack that has all the features needed for a fast and light summit push. An inflatable back panel provides support and gives the pack structure. Radio frequency welded seams and reinforced fabric on the bottom and pocket area provides maximum strength and waterproofness. A mesh pocket accommodates a hydration bladder, stretch cording and gear loops secure crampons and ice tools, and compression straps cinch down your load. Breathable mesh shoulder straps offer a comfortable fit for alpine climbing and peak bagging.