Come and Check Our Promo Solutions.This bike and running backpack made of 420D polyester with features a water bladder, helmet cover, and rain cover design. 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 check inventory and detailed info with us before placing your orders.