The Pump Sack UL 12.5L is an ultra-lightweight and efficient tool for inflating your sleeping mat, weighing only 79 g. Its compact design makes it easy to carry, and it's made from durable, high-quality materials. The sack also serves as a dry bag, offering dual functionality for your storage needs._• Easily inflate a lightweight airbed without introducing humidity• Dual function - Drybag and pump sack• Built-in valve to remove air after the drybag is closed• XL nozzle for high air flow• Lightweight• Fits Robens Peak valve