These knee length socks are made of high stretch polyester, for the best fit. Shin area is extra stretchable for shinguard placement. Mesh area at rear of sock for extra breathability. Around the ankle the sock has a protective impact zone. And to prevent scouring, and therefore blisters, the sock has a flat seem and a reinforced heel, sole and toe. Due to the double elasticated cuff the sock stays in place. These anatomically shaped socks are provided with a left/right fitting indicator.