Anti-Theft Security: It typically includes a built-in 3-pin digital combination lock to secure the main compartment.Charging Capability: Features an external USB charging port, allowing you to charge your phone via a power bank stored inside.Waterproof Material: Constructed from water-resistant fabric (often polyester or nylon) to protect electronics and documents from light rain.Ergonomic Design: Features a breathable mesh back and a single adjustable shoulder strap that can be worn across the chest or back.