No air left! If you can say this about your ORTLIEB compression dry bag, you will be happy about gaining further space inside your pack. By means of the valve mechanism air is expelled from the bag, reducing the packing volume to a minimum. The ultralightweight nylon fabric PS 10 is 100% waterproof- an ideal supplement for non waterproof baggage. The roll closure with a fabric stiffener bar is easy forone person to handle.  Buckles Robust fabric at base: abrasion and tear resistant Broad base loop for easy unpacking and fixing Dimensions Height: 42 cm | 16 inch Circumference: 83 cm | 32 inch Diameter: 26 cm | 10 inch Volume: 22 L | 1342.5 cu inch Weight 108 g | 3.8 oz