Perfect dry compression storage to keep gear reliably dry and compact inside a backpack or bike bag. Made from bluesign APPROVED ultra lightweight Ultra-Sil 30D CorduraA(R) nylon with an EVAC fabric air-permeable base. Squeeze air out while keeping the contents dry, without the need for an old-fashioned purge valve - compression straps make it easy to evenly compress soft items. Simple, extremely light and reliable - the perfect dry compression solution for internal use. Features Waterproof and air-permeable Evac fabric base allows air to be pushed out but water can&';t get in Waterproof, roll-top closure secured with our patented Field Repair Buckle for a reliable seal Compress soft contents to their smallest possible size while adding minimal weight to your pack Ultra-lightweight, bluesign APPROVED Ultra-Sil 30D nylon main body fabric with a non-PFAS DWR finish Waterproof seams you can trust-double-stitched and tape-sealed Fast and easy access through compression strap side-release buckles Achieve even compression and eliminate bulging with ultralight compression straps - the 3L, 5L and 8L include two ladderlock straps and one side-release buckle strap while the 13L and 20L include two ladderlock straps and two side-release buckle straps for maximum compression control on larger loads. Generously sized straps allow max-capacity filling with reinforced stitching on all stress points for added strength Tech specs Materials Bag: 100% Nylon; Rolling: 100% Hypalon; Buckle: 100% Polyformaldehyde Shape Round Repair Buckle Size 15 mm Hydrostatic Head 2000 mm 3L 5L 8L 13L 20L Weight 2.0 oz 2.3 oz 2.7 oz 3.3 oz 3.9 oz Dimensions 5 x 5 x 11 in 6 x 6 x 12 in 7 x 7 x 15 in 8 x 8 x 17 in 10 x 10 x 19 in