The Outdoor Research Durable Stuff Sacks are made of a tough nylon with a durable, waterproof coating. The OR Durable Stuff Sacks seams are taped for complete waterproof protection. The drawcord and cordlock keeper closure keeps gear and supplies safely secured while on the move. The external daisy chain and a webbing bottom handle make for a great carry. The Outdoor Research Durable Stuff Sacks will keep gear dry and safe in the toughest of conditions.