Perfect for adventures that might include too much water and wetness, Alps Mountaineering Dry Sack is 100% waterproof with air-permeable bottom fabric. This permeability lets you compress the air out of the dry sack for ultracompact storage during wet adventures. 70-denier nylon-ripstop sides boast a 100% waterproof coating. Waterproofed and taped seams. Bartacked stress points. A bottom handle makes transport easy. Sizes: Small 16L x 7 dia. Capacity: 615 cu. in. Wt: 4.5 oz. Medium 20L x 9 dia. Capacity: 1,272 cu. in. Wt: 5.8 oz. Large 23L x 11 dia. Capacity: 2,185 cu. in. Wt: 7 oz. XL 25L x 12 dia. Capacity: 2,827 cu. in. Wt: 7.7 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: MEDIUM. Type: Dry Bags.