Osprey Ultralight Drysack 12L, waterproof organisation container with roll-top closure. Made from Siliconised ripstop nylon, Osprey Ultralight range of drysacks are designed to keep your gear protected no matter how wet it gets. At Osprey they know that your equipment and organisation requires a degree of flexibility, that's why they've created their drysacks in a range of sizes, from 3L to 30L and in a variety of eye catching colours. Equipped with a fully waterproof roll-top closure, coated fabric and taped seams our drysacks ensure that your gear stays dry in all conditions. Unlike other drysacks, they have a rectangular shape, which results in more efficient packing. When removed from your backpack, they're able to stand unaided. What are you waiting for - make sure your gear is organised and protected.