The Air Zipp Sack is your ultralight zippered storage solution. They are much more accessible than a stuffsack and because of their shape they tend to fit well into your pack. The "bath tub" construction leaves no seams to leak when they are set on the wet earth or bottom of a kayak. Water resistant YKK zipper. 16L: Wt: 1.7 oz.|12L: Wt: 1.4 oz.|9L: Wt: 1.2 oz.|5L: Wt: 1.0 oz.