The ideal tight for most of your winter riding, the Velocissimo is focused on comfort for riding in mild to cool conditions. Castelli used their Thermoflex fabric for most of the tight. It's not the warmest fabric, nor does it repel water like Nano Flex, but it is the softest, stretchiest winter tight fabric. The comfort is immediate and lasting. For the lower leg from just below the knee, they switch to Nano Flex fleeced stretch-woven fabric that's both warm and highly water repellent for protection against spray coming off wet roads. It's also highly stretchy, and they leave a raw edge so they can construct the ankles without zippers while making sure the tight remains easy to put on and take off. The Kiss Air2 seat pad and mesh bibs keep your bum and upper body happy, while large reflective detailing keeps you visible.