Product name: business travel backpack, waterproof and shockproof Waterproof: The material consists of scratch-resistant, wear-resistant and water-repellent materials and is extremely tear-resistant. Ergonomic design: The shoulder strap corresponds to the ergonomic design, the shoulder strap is breathable, elastic and decompressing, and the wearing experience is comfortable and relaxing as well as breathable and decompressing. When the backpack is heavy with this design it can distribute the total weight effectively and relieve the shoulders. Large capacity: Humanized space that offers space for daily needs and allows you to travel comfortably Usage: Suitable for any occasion including school, travel, hiking, conference, work, etc. Size: width 29 * height 42 * thickness 13 cm