The Sea to Summit Lightweight Dry Sacks. Easy to pack, flexible, Highly waterproof fabric with Hypalon roll top closure. These bags Are an excellent value for the money. Features of the Sea to Summit Lightweight Dry Sacks Lightweight 70D nylon with fully taped seams 10,000mm waterhead, lightweight durable nylon White lining for greater interior visibility Hypalon roll top closure D-ring attachment point at buckle Round base on all sizes Fully taped sealed seams Use: Backpacking, cycle touring, paddling, general boating Now equipped with Sea to Summit?s easy-to-replace Field Repair Buckle