The ideal tights for most of your winter runs. Fast focuses on comfort for cycling in mild to cold temperatures. We have used our Thermoflex fabric in almost all of our tights. It's not our warmest fabric and it's not even as water repellent as Nano Flex but it's the softest and most stretchy winter tights fabric. Comfort is immediate and durable. In the lower leg, starting just below the knee, we switch to the warm and highly water-repellent Nano Flex fabric to protect you from splashes from wet roads. The Nano Flex is also highly elastic and we have left the edges at the bottom unfinished so you can build the ankles without zippers, while ensuring the tights remain easy to put on and take off. The Kiss Air2 seat back and mesh fabric braces provide you with sitting comfort and comfort around your bust while the large reflective details keep you visible.