These bags feature a triple-seal turbo valve and double-zip seal for effective air removal. This set includes a hand pump compatible with standard vacuum cleaners and easy to use. It offers various sizes: 4 Jumbo, 4 Large, 4 Medium, 4 Small, and 4 Travel Roll-Up bags. The price drops from $29.99 to $19.99. Shipping is free over $35 or free for Prime members.