RELIABILITU & DURABLE: The helmet bag is made from high density nylon fabric for better tear and water resistant and heavy duty backpack. Adjustable shoulder straps, chest straps, waist belts, and a comfortable and breathable sponge mesh design on the back, with good heat dissipation effect and no wetting.APPLICABLE OCCASIONS: Our cycling backpack is big enough to hold all the accessories that you can take with you on your way to the trip, whether on the plane or in the car. Reflective piping strip design make it perfect for hunting, travelling, mountain, tactical, cycling, motorcycle, hiking and other outdoors activities.LOTS OF STORAGE SPACE & 2 LAYERS POCKETS: The helmet backpack Measuring 13"L x 8.2"W x 18.5"H (Weight: 2.5 lbs), owns 1 big pocket for large storage and organization, there are multiple compartments inside, unfolds freely 90-180 degrees making you quickly find what you need. The magic sticker on the front of the backpack can stick accessories such as national flag.CONVENIENT CYCLING/MOTOCYCLE BACKPACK: This helmet backpack is designed for helmet travelers, carry your helmet easily whatever you go, hand-free. All expandable helmet straps can be adjusted, Not only hold helmet, also canhold basketball, soccer, volleyball and etc.BEST GIFT FOR SPORTS LOVERS: This backpack is a perfect travel gifts for men who like international travel, motocycle, riding, and overnight trip. If you encounter any problems, please contact us in free time, and we will supply you the best products and service.