What Our Gearhead(R) Experts Are Saying: "I use the ThermoBooster S11 Bib Tights for everything from winter rides to ski touring-they layer easily over my summer bibs, move with me, and keep me warm without overheating. The RX EVO Plus fabric is next-level for cold weather training."When winter settles in, we don't stop training-we adapt. The Assos ThermoBooster S11 Bib Tights are our answer to frigid days on the bike, brisk runs, or snowy trail missions. With a design that layers easily over summer bibs or liners, these tights offer unmatched versatility for cycling and cross-training alike. Their streamlined, bib-style fit moves naturally and eliminates pressure points, helping us push further when conditions try to hold us back. Built with RX EVO Plus, Assos' most thermally insulating textile, the ThermoBooster S11 traps heat, breathes efficiently, and maintains elasticity for total mobility. A brushed inner face delivers soft next-to-skin comfort, while the highly elastic warp-knit construction ensures full coverage without restriction. With no built-in chamois, these tights give us the freedom to customize our layering system based on the day's ride or workout. From early morning intervals to snowy hill repeats, this is winter gear we count on.