Vacuum chamber pouches from UltraSource guarantee to extend the life of your product with exceptional optical quality (clarity, high gloss) and a consistent seal every time. Stronger, thicker seals eliminate product loss, freezer burn, and dehydration while providing extra protection during transport and handling. High-clarity transparent poly/nylon material makes product easily identifiable through the seal. Compatible with small and large vacuum chamber machines. Not intended for food Saver sealers.