When you&';re packing a pile of gear, reach for Osprey&';s StraightJacket compressible gear storage sacks. These durable and water resistant stuff sacks minimize bulk and create stackable rectangles for efficient loading. Specs Volume Dimensions Weight O/S 1220 in3 / 20 l 12h x 17w x 9d in. 0.18 lbs. Fabric Main: 40D Nylon Ripstop Accent: 100D x 70D Nylon Mini Ripstop Bottom: 100D x 70D Nylon Mini Ripstop Features Large zippered access Compressible nylon wings and buckles Compressed rectangular shape for efficient packing Water resistant with waterproof coated fabric and seams