This motorcycle helmet backpack has a simple and classic design and has the functions you may need, which can store helmets, wallets, mobile phones, cameras, energy drinks, etc. There is also an expandable section on the back of the backpack, which can provide space for all types of motorcycle helmets, such as full-face helmets, flip-up helmets, off-road helmets, half helmets, etc. The backpack is made of high-quality waterproof fabric and can be used on cloudy or rainy days. The compact and practical design, breathable and comfortable shoulder straps and back, with adjustable chest and shoulder straps, is an ideal choice for men and women's cycling backpacks. The reflective strip design of the motorcycle backpack allows you to safely drive the motorcycle at night or in low-light environments, ensuring the safety of riders traveling day and night. It is suitable for most motorcycles, off-road vehicles, endurance vehicles, and is suitable for hunting, traveling, mountaineering, cycling, motorcycling, hiking and other outdoor activities. This backpack has two sizes for you to choose from, and you can choose the backpack that best suits you according to actual conditions.