Better in cold and dry and better in wet conditions, the new Nano Flex Xtra Dry fabric makes the Castelli NanoFlex Pro 2 Bibtight your most technical tight. The base fabric is a tighter-knit double-layer construction, and the water repellency treatment is improved to provide even more protection. Castelli is not quite there yet on the goal of bringing full waterproofness to a non-membrane fabric, but this is a significant improvement in making your foul-weather riding much more comfort
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