ALOKSAK storage and transport dry bags are guaranteed waterproof and have been certified to 60 meters for over 2 weeks. Leakproof products offer unparalleled water-tightness in a recloseable cost-effective bag. Most electronics can be used while protected, make great ice packs and also protect food while in a cooler. Can also be inflated to make a nice pillow or seat cushion. Double zippers will be introduced in 2015! / 4 Pack SM: 1 each of 5 x 4, 4 x 7, 6 x 6 and 9 x 6. / 4 Pack: 1 each of 4 x 7, 6 x 6, 9 x 6, 12 x 12 / 3 Pack SM: 1 each of 3 X 6, 4 X 7, and 8 X 11. / 3 Pack: 1 each of 12 X 12, 13 X 11, and 16 X 24.