These vacuum bags are constructed from a high-density, recyclable blend of PE and PA plastic. These are employed to increase the shelf life of fresh goods and other products that may be harmed by excessive oxygen exposure. By removing the air surrounding a food product and contouring the bag around it, you can slow the growth of bacteria while preventing moist food from drying out. Ideal for preserving all perishable foods, including meat, fish, cheese, vegetables, fruits, and a wide range of other foods. Once hoover sealed, the product has a wide seal on all three sides, preventing spills during storage or transportation. There are numerous sizes of these bags.