Covering the 42 kilometres, whether on the road or in the hills, is no mean feat and one that many runners challenge themselves for very personal reasons. You may be doing it for charity, for a personal best or part of training for greater distances. It maybe your first or your tenth or maybe even more. Whatever marathon you are on, training for race day or even for a half marathon there is a product designed for you. These products have been designed specifically for eating up those 26.2 miles.