Lightweight and Durable: Durable, made of tear-resistant polyester, waterproof and lightweight, high-quality zippers. Breathable and Comfortable: This cycling backpack features breathable mesh padding on the back and shoulders for maximum ventilation and heat dissipation. Multifunctional Cycling Backpack: with a 2-liter hydration bladder. You can carry essential items during cycling, such as a mini pump, a repair kit, etc.; Adjustable chest and hip straps for a comfortable fit; with an emergency whistle. Sporty and Simple Design: this ultra-light cycling backpack is sporty, dynamic, and perfectly adapted to functionality and ergonomics. The large U-shaped zipper handle makes it easy to retrieve your items. Powerful Outdoor Equipment: the outdoor sports backpack is suitable for cycling, jogging, running, and camping. Adjustable shoulder and hip straps for men and women. Suitable as a commuter backpack for daily use and work.