The New Balance 903 running shoe from the New Balance running shoe company which has flexible N-Lock bands in the upper that connect the laces to the midsole and act as a supportive midfoot wrap for the runner. A rounded sock liner conforms to the shape of the foot which allows a better individual fit for each person. These two features mean that the New Balance 903 has an outstanding fit for biomechanically efficient runners with normal arches who are looking for a fast training shoe for speed work. It is lightweight and comes in fashionable colours and a range of sizes for both men and women.