Comfort and performance team up in one of our favorite sneakers. Light and airy construction, from the perfed full-grain leather or nubuck upper to the breathable ports designed into the midsole. Smooth tonal and contrast leather trim. Temperature-regulating J&M Smart Degree Technology® polymers that line the interior activate at both hot and cold temperatures, so your feet feel just right all day long. Linings are treated with antimicrobial protection for enduring wear. Contoured, cushioned, removable TRUFOAM® footbed, perfed for ventilation. Ultralight, high-rebound TRUFOAM® midsole offers bouncy rebound comfort with ports that enhance airflow. Grooved rubber inserts at toe and heel provide traction and durability.