The Dottore Termico Bib Tight adds a Heat Fiber layer, made from the residue of coffee bean processing, that pulls far-infrared rays from the surrounding air to raise skin temperature during deep-winter rides. Built on the same UF-Hybrid Shell PLUS fabric as the Hybrid tight, it pairs that heat gain with a low-volume, minimal-seam cut so the extra warmth never turns into extra bulk. What Our Gearhead(R) Experts Are Saying:"I've ridden this well below freezing on days when my other winter tights would have sent me home early. The legs stay warm enough that I'm still thinking about cadence instead of the cold by the second hour."