HIGH-QUALITY MATERIALS: This backpack is made of high-quality Oxford cloth material, which has good waterproof performance, wear-resistant and durable, will not be easily damaged, and is reliable in quality. UNIQUE DESIGN: Size: 41 * 24cm, with double zipper design, the zipper is smoother, more flexible to use, and more convenient to access. The internal single-layer design ensures more space. ADJUSTABLE SHOULDER STRAP: The shoulder strap can be adjusted arbitrarily, adopts an ergonomic design to make you more comfortable, relieve the pressure on the spine, and is equipped with a reinforced handle for easy carrying. EASY TO CLEAN: This backpack is easy to clean. It can be machine-washed or hand-washed. It will not fade, the quality is very good, and the service life is very long. The black backpack is more practical and not easy to get dirty. SERVICE: We are committed to satisfying customers. If you have any questions, you can contact us at any time. We have a first-class customer service team that will reply to you within 24 hours to bring you the most perfect shopping experience.