BREATHABLE & COMFORTABLE: Breathable back material is specially padded with mesh for maximum comfort and heat dissipation. Adjustable mesh shoulder straps with plentiful sponge padding relieve the stress from your shoulders. VERSATILE: This backpack is an ideal sport backpack for all kinds of outdoor activities such as cycling, jogging, climbing, hiking and traveling.It,can be used as a reliable and versatile companion for your short journeys or your sport activities , is great gift for everyone. STRUCTURE: External storage system: 1 exterior pocket with high capacity for umbrella, cell phone,key and other necessities. 1 upper zipper pocket is for lighter and other small items. 1 zip pocket is 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.