Duca del Cosma MJ was created through an exclusive design collaboration between Duca del Cosma and Melanie-Jane Lancaster, partner of 6-time PGA winner Joost Luiten. Waterproof sock system with OnSteam recyclable microfibre. Breathable insert sole with memory foam made from recycled cork. Ultra-light EVA outsole provides perfect traction on the ground. Made of Italian nappa leather of the highest quality.