Pearl Izumi Women's W Transfer Short Sleeve Baselayer Tops Main Body: 100% polyester (70% Minerale polyester 27% polyester 3% elastane) Back Panel: 80% Polyester 20% elastane Imported P.R.O. Transfer-Lite Dry Mesh fabric powered by Mineral provides optimal moisture transfer, dry time and odor absorption All-season versatility Anatomic 'close-to-body' fit