Heavy duty, embossed rolls block oxygen and moisture. Air-removal channels increase suction for maximum freshness, flavor, and nutritional value with no freezer burn! Will work with most external clamp vacuum sealers. Can be frozen, refrigerated, microwaved, heated, boiled, and will withstand high temperature tolerance. Great for sous vide! FDA approved, BPA-free, lead and phthalates free. One box contains 2 rolls. 11"x20'.