UNIQORALE Cooling Backpack Waterproof Bag Keeps Cold for 20 Hours 10mm Insulated Cotton Adjustable Air Valve Outdoor Insulation Package 20L Large

【Extra Large Capacity】This outdoor cooler pack has a large capacity of 20 liters, which is enough to hold picnic food and drinks for your outdoor activities. It can easily meet your needs such as family picnics, camping, and outings. 【Versatile Design】This cooler bag is designed as a backpack and can also be carried by hand, making it easy to carry and suitable for different occasions and needs. Adjustable air valve allows you to better regulate the temperature 【Long-term cold storage】Built-in 10mm insulation cotton cold storage effect is up to 20 hours, and using high-efficiency insulation, you can keep your food and drinks cool during outdoor activities without worrying about food spoilage. Keeps food fresh even in the hot summer months 【Durable Material】Made of PVC material, the bottom is thick and wear-resistant, the cold pack is durable and can adapt to different outdoor environments. Easy to handle on rough mountain roads and slippery mud roads. [Notes] ① After using the cooler box, please clean and dry it as soon as possible. Storing it damp will cause unpleasant odors and mold; ② Do not place it in direct sunlight or places exposed to geothermal heat; ③ Keep the opening and closing time as short as possible. If you open and close the cooler frequently, the temperature inside the cooler will rise and there is a risk that it will lose its cold retention; ④ Please store it away from fire as it is not made of fire-retardant material; ⑤ The inside of the box will be protected from tearing. Therefore, please refrain from storing sharp objects. [Thick bottom] Cooler box, large capacity, 20L, cold and thermal, built-in 10mm insulation cotton, can be folded and stored, lightweight, soft, can be carried by hand or over the shoulder, lunch storage bag, cold bag, picnic/athletic day/commuting/camping/cherry blossom viewing/BBQ/leisure/ Great for fireworks, etc.