ASSOS ThermoBooster Bib Tight S11 BlackSeries (No Insert)Winter bib tights engineered for layering over summer weight bib shorts, using alone for winter cross training, or adding insulation in the most extreme conditions. The construction is similar to the GT HASHOOGI Winter Bib Tights S11, but the insert is omitted for additional versatility. The ThermoBooster S11 pushes versatility to the extreme, allowing a number of use cases to adapt throughout winter. For cycling, it layers over your preferred summer