Abstract: An athletic sock is formed out of a moisture-absorbent yarn material that is knitted to conform to the shape of a human foot. A flexible sheet of neoprene, or similar resilient thermal insulator material, is affixed to the moisture-absorbent fabric so as to overlie the shin area, ankle area and instep area of the sock. The neoprene sheet acts as a cushion between the person's boot and foot so as to improve foot comfortability. The neoprene sheet also acts as a thermal barrier to control the escape of heat and moisture from the sock areas in contact with the neoprene sheet.