The Sea to Summit:registered: Big River:tm: 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, or rafting, 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 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.