ENDURANCE ThermoBooster Bib Tights S11 - Men's

What Our Gearhead® Experts Are Saying:

"The RX EVO Plus fabric on the ThermoBooster S11 is ideal for serious winter mileage—warm but not bulky, and it breathes when you're working hard. No insert gives me the freedom to use my preferred liner underneath."

The Assos ThermoBooster S11 Bib Tights are designed to bridge the performance gap between thermal bibs and true winter layering systems. Built with RX EVO Plus, Assos’ most thermally advanced textile, these tights provide high warmth retention, moisture management, and excellent elasticity. The brushed interior creates a soft, insulating layer that keeps cold out without sacrificing breathability, ideal for aerobic efforts in winter conditions.

With no integrated chamois, the ThermoBooster S11 is intended to be worn over your preferred cycling bibs or liner system. This approach delivers flexibility for a wide range of disciplines from cold-weather road rides to trail runs and winter cross-training. The streamlined fit maintains mobility, and Assos’ X-frame bib support system stabilizes the tights and minimizes lower back sag. Whether tackling base miles or hitting snow-packed trails, the ThermoBooster S11 brings comfort and capability to every winter outing.