Our lightest, most breathable construction yet. In the softest perforated nubuck or full-grain leather. High-rebound ventilated EVA sole maximizes flexible comfort. Temperature-adjusting J&M Smart Degree Technology® activates at both hot and cold temperatures, maintaining a higher degree of comfort so your feet feel just right all day long. Removable, dual-density cushioned footbed. Rubber heel for durability and improved traction.