Material and Durability Made of high - quality nylon with a polyester lining, this backpack is water - resistant, breathable, and abrasion - resistant, ensuring long - lasting use. Capacity and Structure With a capacity of 20 - 35L, it features a large main compartment, a side pocket, and a separate shoe compartment. The main compartment has a dry - wet separation design, keeping your items organized. Design Highlights The shoe compartment has a diameter of 19cm, big enough to hold size 43 shoes, isolating dirt and keeping the rest of the bag clean. Its large - opening main compartment design makes it easy to access your items. Equipped with high - tech waterproof fabric, protecting your belongings from water. Versatility Suitable for both men and women, it's perfect for various scenarios such as swimming pools, beaches, fitness sessions, amusement parks, and daily commutes. Comfort Designed with ergonomics in mind, it offers a comfortable carrying experience.