"The Sea to Summit Big River Dry Bag serves up durable, strong, and abrasion-resistant protection for your important gear. 420-denier nylon fabric with a thermoplastic polyurethane (TPU) lamination holds up through your water-sports adventures such as kayaking, canoeing, rafting, or motorcycle touring, keeping your gear dry through it all. A white interior laminate affords greater visibility, and Hypalon lash loops allow secure stacking or attachment to watercraft, motorcycles, and other equipment. The Hypalon roll-top closure does not wick water, and the Field Repair Buckles can be replaced in seconds with just a Philips screwdriver. Extra-strong and abrasion-resistant, this non-PVC midweight dry bag has space-saving low-profile Hypalon lash loops on the sides for secure stacking and a roll-resistant oval shape. Suitable to keep contents dry in any wet situation where the bags aren't submerged. TPU-laminated fabric with 10,000mm hydrostatic head Extra-strong, abrasion-resistant 420-denier nylon fabric Hypalon lash loops Waterproof, Hypalon, non-wicking, roll-top closure Roll-resistant oval base Patent-pending 3/4"" (20mm) Field Repair Buckle with stainless steel pins"