Castelli 2017/18 Men's Sorpasso Wind Cycling Bib Tight - M13521 Polyester Windstopper X-Fast 2 thigh and knee protection for cold-weather riding Thermoflex Core Due fabric at upper front for warmth with outstanding wicking Thermoflex back and lower legs for maximum stretch, Giro++ seamless straps on bib GIRO3 ankle grippers position the tight and seal around shoecover YKK camlock ankle zippers with reflective tape for high visibility