Assos Winter Cap P3No Cap This thin skull cap fits under a helmet and fights the cold where it bites hardest. The forehead and ears get a double layer of winter-weight insulation, while lighter panels elsewhere let heat and moisture out. The P3 version adds more coverage on the sides, so a freezing headwind doesn't turn into a headache. Features Double-layer insulation, winter-weight fabric across the forehead and ears Lighter, breathable panels, body-mapped to release heat and moisture from the rest of the head Extra side coverage, added in the P3 update for more protection around the ears Seamless, low-volume construction, fits under a helmet with minimal bulk Soft, stretchy fit, comfortable for long winter rides SPECIFICATIONSIntended Use Road Cycling, Winter Riding Fit Unisex Size (Circumference)I (51-58cm), II (59-63cm)Material Polypropylene, Polyamide, Elastane | Assos | Winter Cap P3 In Black Series