This is the Sea to Summit Lightweight First Aid Dry BagFeatures: Best Use: Backpacking & Paddle Sports Closure: Non-wicking hypalon roll-top closure Repair Buckle Size: 5/8in / 15mm (2-Pin) Shape: Oval base Dimensions: (1 LITER 4.4 x 3.7 x 6.4 in) (3 LITER 6.7 x 5.2 x 8.4 in) Weight: (1 LITER 1.1 oz) (3 LITER 1.7 oz) The updated Lightweight First Aid Dry Bag is the perfect way to store medical supplies and keep them dry, visible, and easily accessible. An added TPU window offers excellent visibility, makes it particularly useful in group situations. Made from a bluesignA(R) approved recycled 70D nylon with a C0 non-PFC DWR finish, the interior polyurethane coating is white to improve visibility and make it easy to find small items in poor light. They use the same hypalon non-wicking roll-top closure as our other dry sacks and feature a D-ring attachment point at the buckle. The oval base prevents the dry bag from rolling away on sloping surfaces. Ideal for backpacking, cycle touring, travel, ski touring and more.