Vesta Precision vacuum sealer bags - Embossed micro channel design assures high-speed air evacuation. Heavy duty, air and waterproof materials prevent leaks and freezer burn, extending freshness and reducing waste. Unique combination-layer design makes sealing fast and secure. Rolls have marks along each side to make cutting into custom-sized bags a breeze. A space is provided for marking the type of food and the date of packaging. The bags are made with BPA, phthalate, and lead-free materials and are perfect for food storage, marinating, and sous vide cooking. The maximum temperature tolerance is 212 degrees Fahrenheit (100 degrees Celsius). With 50 bags per pack, the 11x16 inch bag holds approximately 1 gallon. the 8x12 inch bag holds approximately 1 quart