Totally Convenient: Multiple pockets for storage and organization, there's a roomy main compartment that lets you easily carry water. Additional interior pockets are for smartphones, pencil pockets, etc., and zippered exterior pockets can store small accessories such as keys. High quality material: made of ripstop and ultralight designed to keep you cool and dry during your walk Very pleasant, comfortable and durable. Adjustable shoulder straps: bearing system with breathable material, adjustable and padded shoulder straps for comfort, chest straps and belt to meet to your needs. Bike/Ski Design: The mini bike backpack features an ergonomic back design for improved breathability and maximum comfort. The back has a built-in breathable mesh cushion, which is breathable and not tight. Reflective strips for safe riding at night. Outdoor Sports Essential Gear: Lightweight, suitable for outdoor activities such as mountaineering, camping, climbing, hiking, trekking. cycling, mountaineering, trekking, etc.