Laminated Vacuum Packaging -Made of polyethylene and nylon and they are durable enough to resist punctures and abrasions. -Nylon is an outstanding choice for heavy duty performance bags. -In foodservice they are the preferred material for maximum vacuum pouch durability - such as storing and preserving meat product in long duration cold and freezer storage. -These vacuum sealer bags extend shelf life for a variety of food products. -You can prepare meals in advance, pack up and freeze them instead of letting them go bad in your refrigerator. -The vacuum sealing preserves the aroma, freshness, and taste of cookies, fish, fruits, meat, vegetables or other food items for later consumption. -Store fresh or frozen food 2-3 times longer to reduce waste! Size: 16 inch W x 22 inch L Material: Poly/Nylon Color: Clear Gauge: 3 mil Closure: Open ended Quantity: 500 pack