AONIJIE High Capacity Trail Running Backpack Live for running, live for happiness Aonijie cross-country sports backpack, specially designed for cross-country sports, is comfortable, close-fitting, breathable, and has plenty of water. The cross-country sports vest can ensure the timely replenishment of water during outdoor running, mountain climbing, marathon, and adventure sports. And our vest has a large capacity of 12 liters, which can hold all your off-road equipment, and there will be no worry about insufficient capacity. And this backpack is uniformly divided according to the load weight of each area, and there will be no uneven load, which will affect the running experience. If you wear a trail running hydration vest, you are able to enjoy your running time without any scruples. Sizes: S/M recommended chest circumfernece:78-90CM； M/L recommended chest circumfernece:90-102CM； L/XL recommended chest circumfernece:102-115cm Excellent selection of components The hanging buckle is selected from the Duraflex brand, which is easy to open and close, and it can be used for a long time. The zipper uses the YKK brand, the switch is smooth and durable, and there is no need to worry about chain blockage. The interior of the backpack is designed with a sandwich breathable mesh, which is durable and comfortable and breathable. Read more Displacement control system The backpack is designed with point-type adjustable hanging buckles according to different body shapes and different bust. In this way, you can adjust the appropriate elasticity according to your body shape, so that the backpack fits your body perfectly. It will not shake during exercise, which will bring discomfort to exercise. Read more Details design There are many details in the design of the backpack. The first is the whistle, which can increase the steady of cross-country running; the second is the keychain design, which can firmly fix the key and prevent the key from losing; the last is the fixed rope design at the kettle to avoid the violent shaking of the kettle during running. Add a comfortable experience to running. Read more Four-sided elastic fabric The fabric of the backpack is nylon four-sided stretch fabric, which has several advantages. First of all, it has great elasticity and is not easy to tear. Secondly, the elastic cloth can better fit the body, it is very comfortable to wear on the body, and it is durable. Finally, stretch fabrics are lightweight and have good air permeability. Read more PRODUCT INFORMATION Brand Aonijie Name C962#Off-road backpack Fabric 75%nylon/25%spandex Capacity 12L(11 storage bins) Weight Approximately190g Size 40x17x40cm