A waterproof surf backpack that doesn't leak when you stand on it with your whole body, it seals well. It also has side pockets for umbrellas and water bottles, and adjustable straps are perfect for choosing the right length for your height. Great for travel, weekend getaways, shopping and outdoor activities, travel, hiking, camping, hunting, hiking and more. It is a good gift for primary and middle school students, suitable for children, boys, girls, teenagers and adults.