Reusable, microwavable, freezable and boilable, BPA- and PVC-free, heavy-duty 4-mil-thick vacuum bags with superior zipper technology. Full-mesh bags prevent freezer burn and dehydration. Resealable zipper with easy-open tear notch. Bags are made of tough nylon and polyester for puncture and tear resistance. FDA/USDA-approved materials. Work with ALL vacuum sealers. Per 50. Sizes: