The 55 lb sack (also known as the 25 kg sack) has a one-way vent valve made of barrier foil to give you excellent protection from the elements. Thanks to aluminum, which has the lowest moisture vapor transmission rate of any known flexible material, the 55-lb bag maintains product integrity during storage and shipping. Thanks to an added layer of polyamide, these sacks are tear and puncture resistant to protect your products.

Valve bags are the perfect packaging solution for protecting dry formulations such as powders, granules and flakes. And, if your process includes pallet stacking, our sacks are tuned with an external non-slip layer for stability and safety. Once these bags are heat-sealed, the one-way vent valve allows any trapped air to escape, preventing internal gas build-up and extending the shelf life of the product.