The Kilpi HARDROCK-U is a running vest that serves as a backpack for mountain and endurance runners. Its design and construction was designed in cooperation with the runners of the Kilpi Racing team. The base is a soft, padded and perforated material that adapts perfectly to the body while running. At the same time, it is lightweight and breathable, so the runner can hardly feel it. The vest is put on like a standard vest and is fixed with elastic bands of the chest lace. The entire construction of the vest is very light and we offer several sizes, from the smallest to the largest. The vest offers several practical mesh pockets, for example, for gels, soft bottles, or other material. Zippered pockets for valuables are on the front and back. The vest also offers the possibility of attaching cross-country ski poles with elastic eyelets. Of course, the Kilpi HARDROCK-U vest has reflective prints.Material composition: 100% nylon