Designed to help you ride out any storm, Castelli's Nanoflex Pro Bib Tights pair extreme rain protection with excellent support. Nanoflex fabric is coated to make Castelli's most water-repellant fabric ever, turning drops of water into spherical balls that stay on top of the fabric or bounce off without a trace. The Nanoflex Pro tights have overlays of Nanoflex on the thighs, knees and rear for a second level of protection from the rain. Waterproof reflective bands on the inner legs protect against wheel spray and increase your visibility in low-light or poor weather conditions. Reduced seam construction reduces chafing and irritation and the built-in Progretto X2 chamois delivers support on even long rides.