Merino Fresh fiber provides great cushioning and space compensation; Keeps your feet warm and dry in extreme temperatures and weather conditions * Strategic Cushion provides shock protection and space compensation, embedded arch support reduces foot fatigue, seamless toe for ultimate comfort * Signature Moisture Transport wicks moisture * Contoured "Y" Heel deep pocket prevents slipping, flex zones bend with foot movement, conforms to foot * ArmourBlock helps prevent growth of odor-causing bacteria in the sock