Kenneth Cole New York Men's Sum-Times Chelsea Boot 100% Leather Imported Synthetic sole Shaft measures approximately ankle-high from arch Lining infused with 37.5 technology 37.5 technology maintains your ideal core body temperature of 37.5C Billions of active particles attract moisture vapor away before sweat can form, so your foot stays dry and cool. The particles retain infrared energy when its cold to keep your foot warm The particles trap odor molecules, so you'll feel foot-fresh all day long