When used properly, you can preserve your foods up to 5x longer and reduce freezer burn with these vacuum bags. Designed for tough food and industrial applications. The high nylon content of these bags enables it to be used in critical vacuum applications that require strength and impact resistance. Low oxygen transfer rate, high impact resistance, and its low cost make it popular with meat, fish, cheese, nuts, dried fruit, jerky, and many other applications. It can also be used in boilable applications to 30 minutes of exposure.