Activate U- Throat Leather sneakers, EUC, size 13 Color dark brown, No box. 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.