Anti Stink, Reflective. Designed for Running. Check your fit:1) PerformaHeelRun stripes should sit horizontally on the back of the heel2) Place the cuff of sock just below the knee in a comfortable location3) Evenly distribute the leg fabric between knee and ankle. We mapped the movement and impact of a runner's foot to create these socks that cushion, hug, and breathe in all the right places. | lululemonMen's MicroPillow Compression Knee-High Running Socks Light CushioningColor Black/SilverSize Large