They utilise Castelli’s third-generation Nano Flex fabric, which does an excellent job of beading road spray and rain. You’ll remain comfortably dry for a few hours because breathability is better than hardcore waterproof tights.
The rear uses the X-Dry version of Nano Flex. Its coarser surface helps grip the saddle and it’s much more abrasion resistant and so avoids premature wear or bobbling.
The Progetto-X pad is comfortable but not bulky. The shaping of the legs by using multi-panels front and back adds freedom. And keeping seams away from areas of potential chafing – behind the knee, for example – is a neat touch.