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. The large assortment contains four bags, one each of 4x7, 6x6, 9x6, and 12x12.