Castelli Women's Tutto Nano Tight X-Large BlackThe Castelli Nano Tutto W is a Breathable, Water-Resistant, Durable Tight. It features Castelli’s Nano Flex 3G fabric, designed for winter as it is warm, grips well to prevent shifting, repels water on top of a chemical finish and it’s incredibly soft. To make it even more irresistible, it contains a KISS Air2 Donna seatpad, specifically designed for a better fit for women. On top of being an amazing winter tight, it also functions very well in spring/fall weather, with added breathability for warmer days.500190802093