Come and see our amazing products. This bike and running backpack features a water bladder, helmet cover, and rain cover design. It is made of 420D polyester. The special inner layer can be used for holding water bladder. Removable pouch on the shoulder strap to store your cellphone. Mesh cover to hold your helmet. Rain cover to protect the backpack and your essentials in heavy rain. Ventilated mesh and comfortable foam padding for extra back support and breathability. Pls confirm further with us if any query about packing info, inventory status and time schedule.