VacMaster Storage Bags use our patented Vac-Strip technology to keep foods fresh up to five times longer. Typical embossed-channel vacuum bags tend to flatten over time, minimizing the channel for air to escape, which leads to an incomplete vacuum process. Our unique bag design maximizes bag suction during the vacuum process, decreasing machine stress. Our bags work harder so your machine doesn"t have to. Our storage bags have a third layer of perforated material, creating a channel for air to escape. The perforated material ensures a constant vacuum and increases the ability to package liquid-rich foods like fresh meats and fish. Our innovative design gives you an optimal vacuum process - every time