Features: 1. At front of our bag, there is a buckle and expansible compartment for holding your helmet stably. It's not only hold a full size helmet, but will hold essentially anything else you need. 2. The shoulder straps are designed with mesh and foam, which has good air permeability. The anti-slip mesh prevents the shoulder from slipping when the shoulders are worn; the foam has the characteristics of cushioning, light weight, breathable comfort, heat insulation and moisture resistance. 3. According to the ergonomic design, it fits the back, is comfortable and breathable, and has a pull-up strap design to reduce the pressure of the backpack, providing you with a backpack that makes travel easy. 4. A water bag(not included) can be placed inside, and the straw of the water bag can be led to the shoulder strap, which will free your hands from fetching water, replenishing water at any time, suitable for various outdoor activities. 5. Made of water-repellent nylon fabric, which is lightweight and wear-resistant. It can prevent the internal items from getting wet in a short time when it rains. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material:nylon, foam, mesh Size: As the picture shown Color/Style: As the picture shown Weight: 620g includes: 1 x Bag(only)