The Castelli Competizione Bib Tights, designed for cyclists who do not ease off in winter, are crafted to cover the widest possible temperature range, from cool days down to sub-zero conditions, when you may prefer full wind protection. They may appear simple, but their clean lines conceal a wealth of technology within. The fit uses three different fabrics to provide the right coverage for each part of the body. The front fabric, from the waist to the knee, is Castelli’s Core Due fabric, a high-density polyester and nylon blend that blocks a significant amount of wind.Across the back of the thighs and the glutes, a highly elastic fleece fabric enhances the fit. From the knee to the ankle, Castelli Thermoflex delivers perfect warmth and stretch, and a single inner-leg seam prevents chafing around the knee. The design is finished with a raw-cut, flat ankle, flat-knit straps and the KISS Air2 seat pad.KISS Air 2 seat pad: High-performance pad for all conditions.