DESCRIPTION Fit With Body Backline Motorcycle backpack fits great on the back and it really hugs you well. The breathable mesh material on the back can helping sweat to dry quickly. Expandable Storage The size of the motorcycle riding bag is 20*14*7 inches.The bottom extendable length is 7.09 inches. There is an expansion zipper on the backpack. Open the zipper to get more storage capacity to hold a helmet. Multifunction Storage Compartment The storage padel has different sizes of compartments, which could perfectly hold small items. The main compartment can hold the laptop. Diversion Shell The streamlined hard shell could effectively reduce resistance during riding. No parachute effect. Reflective strips on the shell improve visibility during night riding Thickened Hardshell The backpack shell is embedded with a thicker support plate to better resist external pressure or impact. Provide better protection to the items. Material :PVC+EVA. FITMENT Universal Fit