Made from a lightweight 70D waterproof, durable nylon fabric with a white interior lining and a TPU window for visibility, the First Aid Dry Sack is printed with the international standard (ISO 7010) symbol for first aid kits. Using the same hypalon non-wicking, roll-top closure as 's other dry sacks and featuring a D-ring attachment point at the buckle, it is available in three sizes for everything from day use to longer expeditions.