This item is designed to keep food fresh. Adopting premium composite material ensures that it is and safe. It’s working temperature is from -20 to 85 centigrade degrees, and it can be straight put into microwave for heating or refrigerater for freezing. Vacuum bags are better than normal sealed bags. Feature - - Material: PA and PE - Size 1: 26 x 34cm - Size 2: 26 x 28cm - Designed to keep food fresh for a longer time. - Its composite material ensure its durability and that it is safe. - It’s working temperature is from -20 to 85 centigrade degrees, can be heated by microwave oven or by refrigerater. - Suitable for outdoor camping, fishing, picnic and so on. - With matched pump, it is easy to draw off the air to make it become a . Package list: 6 x fresh bag size 1 6 x fresh bag size 2 1 x air pump