The Sorpasso RoS Wind Bib Tights from Castelli are perfect for serious winter cycling. These tights are designed to withstand extreme cold weather conditions.Featuring GORE-TEX® INFINIUM™ fleece-backed panels on the upper front and thighs, these tights provide excellent wind resistance and help maintain optimal muscle temperature. Unlike many wind tights, the Sorpasso RoS Wind Bibtight doesn't compromise on fit, comfort, or breathability. The two-way stretch fabric and careful patterning ensure maximum comfort during your rides.The non-windproof sections of the tights are made from Castelli's Nano Flex 3G and Nano Flex Xtra Dry fabric. These fabrics offer mild compression, softness, and stretch, as well as the latest water-repellent finish from Castelli.The Sorpasso RoS Wind Bibtight features Castelli's Progetto X2 seat pad, which eliminates friction and provides cushioning where it's most needed. The anatomical cut of the tights ensures a comfortable fit, while the lie-flat bib straps keep everything in place. The YKK® Camlock® zippers at the ankle provide secure closure, and the large reflective panels on the ankles increase visibility in low-light conditions.No detail is overlooked with the Sorpasso RoS Wind Bibtight. These tights are perfect for cyclists who refuse to let the cold stop them from riding. Key features of the Sorpasso RoS Wind Bibtight include:- Nano Flex 3G fabric for warmth, compression, softness, and water repellency- GORE-TEX INFINIUM™ WINDSTOPPER® X-Fast fleece-backed fabric panels for extra warmth- Nano Flex 3G back and panel to protect from road spray- Anatomic cut to hips and knees for increased comfort- Reflective inserts for maximum visibility from behind- Lie-flat bib straps for a hassle-free fit- YKK® Camlock® zippers at ankles for secure closing- Progetto X2 Air seamless seat pad- Temperature range: -5°C to 8°C / 23°F to 46°F- Weight: 327g (Large)Whether it's cold or not, these tights are a must-have for any serious cyclist.