Pro-3 Down Low, SM (Men Size 4-7, Women Size 5-7.5), Black. Incrediwear PRO-3 Thin Sport Incredisocks use a unique Carbonized Charcoal Anion Technology (CCAT for short) that increases circulation to your feet, which can lead to increased performance, decreased foot fatigue and shorter recovery. PRO-3 is specifically designed to ensure that your feet are treated to an advanced sock thatÂ’s odor resistant, moisture wicking and extremely comfortable. We use a patented Italian 3-D weaving machine while constructing our 200 thread count PRO-3 sock and the results are the most comfortable, non-stinky, high performance sock in the world!!