Thank you for viewing! "Lightweight x Waterproof" for comfort both outdoors and in the city! This is a multi-functional backpack that can be used for a wide range of activities, such as marathons, hiking, cycling, and commuting by bike. Made of waterproof nylon & polyester material, it securely protects the contents from sudden rain and sweat. Weighing only about 140g, it's ultra-lightweight, so it's comfortable even when worn for long periods ◎ The design fits the body, making it less likely to sway, and smoothly accommodates active movements. It's also a convenient design for everyday use. ★Product Description 【Color】Blue 【Size】Approx. 37 x 20 x 7cm (Free Size) 【Material】Waterproof Nylon/Polyester 【Weight】Approx. 140g