Come and see our amazing products. This hydration bag is specially designed for road cycling/running/hiking. It is small and low-key. It makes your back feel light and stable without causing great wind resistance. It keeps your body in its best condition. You can achieve excellent performance in marathon training or cycling. The internal 2-liter lining is separated from the backpack for easy cleaning and assembly. The rubber nozzle has a simple on-off valve that can stop the water flow when needed to ensure that the outdoor experience does not leak. Our waterproof lining has passed the pressure test and tested in accordance with the highest quality standards. Pls confirm with us about the packing info, stock color and exact production time before placing your order.