25L Drybag Backpack-100% Waterproof-Heavy Duty Roll-Top Closure-Cushioned Back. Do you need a backpack worthy of all outdoor adventures? Our stylish 25L fully waterproof drybag with 500D PVC coating keeps your kit safely protected against the elements. The bag can easily hold your seashell robe, a towel, a swimsuit and plenty more. 16.0 cm x 37.0 cm x 50.0 cm. Weight: 1.2 kg. 37 x 16 x 50 cm; 1.2 kg.