1. Men's crossbody bag, with side pockets that can hold your bottles.2. Adjustable double-sided shoulder strap: Women's crossbody bag, with a D-shaped ring in the lower half. The adjustable shoulder strap can be connected to the left or right D-shaped ring according to your preferences, making it easy to wear on the left or right shoulder. Adjustable shoulder straps can be adjusted according to your preferred length.3. USB charging port: This men's strap bag does not include a charging power supply. This men's mountaineering strap backpack is equipped with a USB charging port, which is very convenient for charging electronic devices by connecting to your own power bank. You can connect your phone to the power bank and easily charge it outdoors and during travel. Anti theft zipper, safety bag, and high-end buckle. (Small sized bags do not have a USB charging port)4. Lightweight and waterproof: This men's and women's shoulder bag is made of nylon waterproof material. They are soft, washable, waterproof, wrinkle free, and wear-resistant. A waterproof exterior can keep your clothes and items dry; Exquisite craftsmanship showcases your outstanding temperament.5. Multiple occasions: This strap bag/day bag/chest bag is suitable for both women and men, and is suitable for any occasion. The strap backpack is suitable for hiking, walking bicycles, cycling, hunting, travel, business, gym, camping, beach, and daily use. Suitable as a strap backpack, wrap this black strap bag comfortably over your shoulders or through your chest to stop thieves and keep your hands free.