Thermal Winter Under-Helmet Skull Cap The Thermal Winter Under-Helmet Skull Cap is designed to keep your head and ears warm during cold weather rides while fitting comfortably beneath a cycling helmet. Constructed from soft thermal fabric, it provides excellent insulation without adding bulk, helping protect against cold wind while remaining breathable during hard efforts. Key Features Thermal fabric providing warmth in cold conditions Low-profile design fits comfortably under a cycling helmet Extended coverage protecting ears from cold wind Breathable construction helping regulate temperature Stretch fabric ensuring a secure and comfortable fit Lightweight and compact design easy to store in a pocket The Thermal Winter Skull Cap is an essential accessory for riders training through winter, helping keep the head warm without compromising comfort or performance. From the World Tour to your door.