Come and Check Our Promo Solutions.This backpack is made of PVC, durable and light. Use four layers of high-quality materials to prevent heat penetration and ensure that the contents remain cool or warm for 5-7 hours. Easy to carry shoulder strap handle and shoulder strap, comfortable and strong. This cool bag is perfect for idyllic outdoor activities with family and friends. It is suitable for people who like picnics. It is suitable for picnics. Pls check inventory and detailed info with us before placing your orders.