These Wartmann Vacuum Bags 15x25 cm - 50 Pieces are specially designed for sous vide cooking and are suitable for cooking at temperatures up to 100 degrees Celsius. The air can quickly be removed from the bags due to the specially designed pattern on the inside of the vacuum bags. The Wartmann Vacuum Bags 15x25 cm - 50 Pieces are suitable for all modern vacuum machines and are completely airtight.