Ultralight Cycling Backpack with Hydration Bladder Breathable Bag for Running and Hiking

Outer elastic mesh bag for fixing your helmet, easy to take it to anywhere.. Thicken EVA padded back for maximum breathability and comfort. Hydration insulation layer and pipe outlet on the shoulder strap make drinking more convenient. 18L large capacity can store basic items needed for daily use. Made from tear impervious and waterproof polyester fabric for extreme light weight and durability