They're constructed with twice the puncture resistance.  The BPA-free multi-ply material blocks moisture and oxygen, protecting its contents from freezer burn and spoilage up to 5x longer than non-vacuum storage methods.  And because sealed bags are airtight and durable, they prevent floating during the sous vide water bath for consistent and delicious cooking results. 
   
 BPA-free multi-layer material is safe for sous vide cooking and designed to withstand boiling temperatures. 
 Vacuum sealing your ingredients allows heat to better transmit to your food and ensures that packets stay submerged during the sous vide water bath. 
 Multi-ply material locks in freshness to prevent freezer burn and can go straight from the freezer to sous vide bath with no separate defrosting required. 
 Specially designed channels block oxygen and moisture to maximize air removal, keeping food fresh up to 5x longer than non-vacuum storage methods. 
 Features: Heavy Duty
 Food Storage Bag Closure Style: Vacuum Sealed
 Size: 2
 Volume Capacity: 1 gal
 Recommended Use: Multi use
 Color: Clear
 Assembled Product Dimensions (L x W x H): 5. 00 x 2. 50 x 11. 70 Inches