This backpack is a versatile sports backpack designed for cross-border outdoor activities including running, marathons, fitness, hiking, and mountaineering. By using high-quality waterproof materials and a breathable design, it not only ensures excellent water resistance but also delivers a comfortable carrying experience during long periods of use. Furthermore, its structure emphasizes ergonomics with thickened shoulder straps and a padded back panel that effectively distributes weight, making it ideal for a wide array of challenging outdoor scenarios.