For lightning-fast inflation and water protection, the BlockerLite Pump Sack gives you a versatile and lightweight option for gear storage and mattress inflation. Designed with our friends at SealLine, the pump sack features durable and welded seams. Big enough to hold 20-liters of gear, it’s the perfect size to store extra clothing before inflating a high-volume air pad that features the WingLock or TwinLock valve. * Materials: Polyester* Width: 5.5 in / 14 cm* Length: 10 in / 26 cm* Height: 24 in / 61 cm* Weight: 5 oz / 150 g* Packed Dimensions: 6 x 6 x 1 in / 15 x 15 x 2.5 cmFeatures:* Timesaving: Inflates your pad faster than breath inflation. Easily snaps onto Therm-a-Rest valves* SealLine® Protection: Built with ultralight waterproof BlockerLite™ material from our pals at SealLine, this dry sack is extra durable and features welded seams to keep your gear protected* Versatile: Doubles as a lightweight 20-liter dry sack when it’s time to hit the trail* Not compatible with Classic Valves (valves on pads pre 2020)