Reclosable, zip lock Poly bags. Select any size, thickness, or quantity for your item's storage needs. Use these zip lock bags to organize, protect, package, or ship any Item. 2 Mil, 4 Mil, 6 Mil, and 8 Mil Reclosable Poly bags are available for use with light weight to heavy objects. Select higher Mil values to use with sharp or pointy objects that require a tough, strong Poly bag. Bags are manufactured from 100% virgin, high clarity polyethylene film. Meets FDA and USDA specifications.