1. Durable and lightweight material - made of waterproof and Oxford fabric. The integrated solid shell structure can effectively increase the protection and elasticity of the sling shoulder bag, reducing collisions in daily use. The bidirectional metal zipper can be opened and closed smoothly without getting stuck. 2. Large capacity sling bag - The main bag has sufficient storage space and is designed with multiple layers of partitions to meet the storage needs of iPads, headphones, phones, books, wallets, etc., making your items in the bag organized. This shoulder bag is an excellent companion for outdoor/indoor activities and is suitable for daily use. 3. Durable dual access zipper with anti-theft combination lock design, easy access, improved security, and can also provide you with private space. And the hidden anti-theft pocket on the back of this shoulder bag can also protect your valuable items from thieves. 4. The back is made of breathable sponge mesh, which can alleviate the pressure of long-term carrying. You can also easily change the left and right directions of the shoulder straps according to your preferences, and place the bag in the front or back. 5. USB Charging Port - This crossbody bag has an external USB port and a built-in charging cable that can be connected to the power bank for charging (excluding the power bank).