Bib tights without an insert have long been the pros' choice for good reason: You can continue wearing your perfectly broken-in bib shorts underneath, which also add extra insulation, and you extend the tights' life by eliminating a wash cycle after every winter training ride. The tights are ideal for those frigid winter rides where exposed skin from knee warmers and knickers won't cut it-where full-leg coverage and high levels of insulation become mandatory. RX Heavy is our highly insulating brushed Roubaix textile that makes up the majority of the paneling, which now features an ECO water-repellent treatment for further protection from light precipitation. This fabric ensures your pelvis and legs stay shielded from biting winds and cold air, while the backs of the legs are made up of RX Light for added breathability in this high-flex zone. The fit of the bibs falls into our regularFit category, which means they're lightly compressive where they need to be, but not as tight as our racingFit apparel. The fabric panels flex with each pedal stroke, as they're both pre-shaped and sewn to fully wrap and support the upper leg muscles, knees, and calves while in motion.