The Kelty Compression Stuff Sack will increase the available space within your pack by compressing sleeping bags and clothing down. Four vertical compression straps. Quick-release buckles. Can be buckled to the outside of a pack. Hidden storage pocket. Self-stuffs into storage pocket. Water-resistant nylon ripstop with DWR finish. Size Extra Large: Full size: 11 x 22″ / 28 x 56 cm Compressed size: 11 x 10″ / 28 x 25 cm Weight: 6 oz / 0.2 kg Size Large: Full size: 10 x 18″ / 25 x 46 cm Compressed size: 10 x 10″ / 25 x 25 cm Weight: 5 oz / 0.1 kg Size Medium: Full size: 8 x 15″ / 20 x 38 cm Compressed size: 8 x 10″ / 20 x 25 cm Weight: 4 oz / 0.1 kg Size Small: Full size: 6 x 12″ / 15 x 30 cm Compressed size: 6 x 9″ / 15 x 23 cm Weight: 3 oz. / 0.1 kg.