A durable, strong and abrasion-resistant option. The Big River Dry Bag uses a 420D nylon fabric with a TPU lamination. This is the perfect storage bags to keep your gear dry for all your outdoor activities. A white interior laminate affords greater visibility, and hypalon lash loops allow secure stacking or attachment to watercraft, motorcycles and other equipment. TPU laminated fabric with 10,000 mm hydrostatic head. Super strong, waterproof and abrasion-resistant 420D Nylon fabric. Waterproof hypalon roll-top closure does not wick moisture. Best use: Paddlesports, overland, bike packing. Closure: Hypalon roll-top closure. 420 Denier heavy duty Nylon fabric. Details. Repair buckle size: 3/4 in / 20 mm (with two stainless steel pins). Dimensions: 15x10x33 in / 38x25x85 cm. Weight: 10.3 oz / 293 g.