VERSATILE: This Bicycle Backpack is an ideal sport backpack for all kinds of outdoor activities such as cycling, jogging, climbing, hiking, traveling, etc. It can be used as a reliable and versatile companion for your short journeys or your sporting experience and daily use, and great gift for everyone. BREATHABLE & COMFORTABLE: Breathable back material is specially padded with mesh for maximum comfort and heat dissipation. Adjustable mesh shoulder straps with plentiful sponge padding help relieve the stress from your shoulder. The waist straps are designed to facilitate stress release and to ensure stability while cycling. CONVENIENT DESIGN: External storage system: 1 exterior pocket with high capacity for umbrella, cell phone, key and other necessities, 1 upper zipper pocket for lighter and other small things, 1 zip pocket for helmet hood, 2 mesh pockets on both sides to carry bottles; Internal storage system: 1 compartment with open pocket you can carry water bladder (NO WATER BLADDER INCLUDED), 1 main compartment.; On the shoulder strap, there is an access for drinking hose and headphones. SECURITY GUARANTEE: The front and shoulder straps have reflective strips to keep safe in the night. With a whistle on the chest strap, you can use it in events of emergency. DURABLE: Made from high quality tear resistant material, provides extra strength and long-lasting performance with the lightest weight possible. with long serving life. NOTE: Water bladder, rain cover, mobile phone, camera in the picture are not included.