1. Used for outdoor sports or cycling, 28L large capacity, can put basketball, helmet, shoes, glasses, headphones, water glasses, umbrellas and other items inside. 2. Encrypted nylon material, anti-fouling and easy care, strong and tear-resistant. 3. Integrated storage bag, light and easy to carry, only slap size after folding, can be easily put in the pocket. 4. Splash-proof, can keep the internal clothes dry for a short time in case of light rain when traveling. 5. Lightweight and spacious, ideal for day trips, vacations, travel, day hikes, schools, camping and shopping.