* Mid crew, sits a little lower on ankle
* Medium - W 6-9,    M 5-8.5
* Large         W 9-12,  M 8.5-12
* 65% Polypropylene, 15% elastic, 12% nylon, 8% Sta-Cool®
* Polypropylene is a performance fiber that moves moisture away from the skin
* Arch support helps to keep the sock in its place 
* Ventilation channels at the top of the foot allow air to bypass the fabric and help the skin stay dry 
* Cushioned sole lessens the impact in strike point areas of the foot
* Custom made in Haw River, NC by Pro Feet
* All profits from Stak go to resurfacing small town PB courts