Features of the Castelli Men's Nano Flex 2 Bibshort Nano Flex fabric provides outstanding warmth and stretch with water resistance Minimum seams for maximum water resistance KISS Air seat pad for all-day comfort Mesh bib straps for breathability Screen-printed Castelli graphic on both legs Giro3 ankle grippers lie flat and seal around shoecover YKK ankle camlock zippers with reflective tape for High visibility