Built to last, the VacMaster 4-Mil Vacuum Packaging Chamber Pouches are designed for high puncture and abrasion resistance, giving an added layer of protection. Upgrade to the 4-Mil Chamber Pouches, and worry no more about bones poking through bags or tears and leaks ruining the seal. Great at handling spiny, sharp, or boney items, the 4-mil material is thick enough to prevent tearing or leaks. Protect food from freezer burn and dehydration with our high barrier Nylon/Polyethylene construction that provides optimum freshness and a positive reliable seal, keeping food fresh up to 5x longer. BPA-free and are true to dimension and can be frozen, refrigerated, microwaved, boiled, or cooked sous vide. VacMaster pouches are transparent, allowing for easy identification of the product.