[Material & Supplies Organization]:The chest bag is made of premium waterproof polyester fabric and breathable mesh design on the back for greater comfort. Size 7 x 22 x 30 cm. Multiple zipper pockets on the front are easy to store iPad, mobile phones, umbrellas etc. There are many compartments inside the bag, you can divide your different supplies according to your needs. D-shaped buckles on both ends under the backpack. You can change to a left shoulder bag, right shoulder bag or backpack as you like. Our crossbody bag meets all your needs when you wear it and go for a walk. [Charging Port]:The chest bag has no charging source. The backpack, crossbody and shoulder bag is equipped with a USB charging port. Convenient to charge your electronic devices by connecting it to the charging source of your phone. You can easily connect and charge your phone when you are out and when traveling. [Widely Use in Our Daily Life] When you are doing sports, hiking, walking, outdoor, travel, cycling, gym, picnic, business, etc. It is a great gift for your family members and friends, please feel free to buy our shoulder bag. Customer in mind. If you have any questions, please contact us and we will solve your problem.