Closeouts. Rafting trip to rain-soaked backcountry journey, you can count on Granite Gear's compression dry sack. Featuring an ultralight silicone-coated 30 denier ripstop nylon, this baby is ready to perform in wet, mucky conditions! Plus, you can compress it down to its smallest possible size thanks to the eVent® waterproof breathable membrane bottom, which allows air to seep out as you compress without risking water entry later.