Airflex is extremely breathable material for cool comfort during active use. It is specifically designed for air circulation, heat transfer and moisture wicking away from the body. Any activity where excess heat or perspiration could be felt under the brace is an ideal application for this product. Additionally, it is stretchy and smooth for the highest level of comfort. The Ortho Active Stabilizing Knee Sleeve is an economical sleeve with two spiral stays medially and laterally and a patella hole which relieves pressure on the patella. The compression sleeve and side stays provide knee stability and the patella buttress stabilizes the kneecap.