The FR-C Pro Thermal Bib Knicker is constructed of Super Roubaix fabric with a focus on comfort and quality.  The thermal fabric offers a brushed interior that is soft to touch and provides warmth while riding in cooler temperatures.      Tech Specs Super Roubaix Endurance panels comprise the short area of the garment and the low leg panels  Super Roubaix Carbon featured in the Core Contour System and from knees down to the ankles  FR-C Pro stretchable, breathable, and stabilizing bib uppers  Reflective zippers at the ankles  Cirro S chamois  Embossed logo on calf  Recommended temperature range : cool and cold weather, from the low 60s to 40s or lower