The Bontrager Circuit Thermal in Form Bib Cycling Tights will keep your legs warm & your performance up when the temperature drops. The Circuit Thermal in Form Bib Tight insulates you from cold air, providing warmth to key muscles to extend your riding season. The in Form Bio Dynamic Chamois has a dual density foam pad for extra cushioning on long winter training rides. Features Stratus in Form Bio Dynamic Chamois: Over Easy constructed dual-density foam pad Profila Thermal fabric is engineered to trap & retain body heat Profila Dry mesh back & bib straps Silicone ankle gripper & semi-auto locking zippers Reflective elements add contrast to enhance nighttime visibility Inseam: XS-S 29.5”/75 cm, M-2XL 30"/76 cm Fitted cut provides streamlined body fit for enhanced performance