Product Features: Large Capacity and Multiple Uses: Can store more than 99% of motorcycle helmets(Such as full-face helmets, rally helmets, flip-top helmets, cross-country helmets and other kinds of helmets). Also suitable for books, iPad, laptop, basketball, soccer, volleyball, summer clothes and some small items. Waterproof and Durable: Made of thick and durable 800D polyester material, it has super waterproof and tear resistance, And waterproof technology is used in zippers and seams, make sure the contents of your backpack stay dry while you ride in the rain. Note: Please avoid prolonged exposure to heavy rain. Safety and Comfort: Equipped with reflective letter strips for safe night riding conditions. Ergonomic shoulder straps greatly diffuse the concentration of the pack's gravity. Tips: Turning on the motorcycle lights at night will help your riding safety. Product parameters: Product Name：Motorcycle backpack Product Material：800D Polyester Product Size：19.7*14.2*12.6 inch Scope of Application: Storage more than 99% of the full helmet / rally helmet / shaped helmet and so on Product Color：Black Product List：1 x Helmet bag