The Free Flow Metal shoe attracts attention, but repels heat. The upper is made using special Argenthon on the outside which reflects heat radiation, ensuring cool feet on hot summer days and giving the shoe a distinctive style. On the inside, the bio-based Natex fibre and hemp sole help to disperse moisture quickly and minimise unpleasant odours. UYN has eliminated any structural seams, creating a high-performance shoe with the comfort of a sock.