FAIR TRADE CERTIFIED - Produced in a Fair Trade Certified facility. Building worker well-being into our product DNA. SYNTHETIC FIBRE - Engineered materials that offer enhanced properties or performance. MULTI-USE - Versatile high performance designs for diverse activities and conditions. RHO - Thermally efficient base layer with excellent moisture management properties. Has stretch comfort. #1,804,971 in Clothing, Shoes & Jewelry ( ) #420 in #63,847 in