Highly airtight! Excellent cold retention. Cooler bag [Features] Perfect for keeping hot or transporting items that want to reduce sudden changes in temperature such as fresh fish, meat and frozen foods. Made of moisture resistant, heat insulation, and cold insulation (heat insulation), it has an air tight seal and excellent heat retention. Easy to seal through the opening with an adhesive seal, zip, and zipper. Helps prevent contents from popping out and is shatterproof. Safe to carry fresh treats and lunches that are concerned about deformation or siding. Durable construction and can be reused. Environmentally friendly and energy-saving product. Care Instructions: Keep away from fire or high temperature items (heat resistant temperature: approx. 154°F (70°C)). The bag may deform, break. Does not shake or fall off while holding frozen hard or sharp objects. Also a bag. may tear, so please be careful not to overload. ■ If you put heavy objects in it, the handle or handle may tear out. ■ Please be careful when sealing the double-sided tape part with moisture or dirt will decrease the adhesive effect when sealing it.