Patented graduated compression offers improved oxygen delivery to muscles, reduces lactic acid production, reduced foot and leg swelling, extra smooth toe seam, latex free, made with antibacterial Silver Drystat™, 100% recyclable. Compression rating 11-16.6 mmHg. Currently being tested for UV rating. Fabric Contents: 75% Polypropylene 15% Lycra 10% Nylon Sizing Chart