☺Excellent Quality ☞ The cooler backpack is made of strong polyester fabric and high-quality oxford fabric, with waterproof PVC coating on the back, fringed seams, strong and durable zipper. Has excellent heat resistance. The premium food-grade inner container has a waterproof and stain-resistant inner cooler that is easy to clean and keeps your food dry in the cooler bag. Heat protection and cooling ☞ The picnic backpack is made of EVA insulation and PVC coating. The inner lining is food-grade PEVA and is filled with 6mm EPE foam, which can keep the backpack warm and cold for several hours and keep food fresh, depending on the item inside, and the bag is waterproof ☺ Upgrade Große Kapazität ☞ Sufficiently large space for meals, beer, snacks, drinks, towels, mobile phones and pictures can safely store daily necessities. Easy to clean inside and out. Durable cooler bag suitable for beach picnics, family vacations, camping, walking, hiking or similar activities Comfortable to carry - This backpack for men and women has a large capacity and low weight. Adjustable shoulder straps and ergonomic design, padded shoulder straps and mesh back for comfort and good ventilation when carrying many items ☺ High-quality service ☞ We are committed to providing our consumers with the highest quality 20L cooler bag.