This cap protects against brutal windchill with a stretchy wind-proof shell fabric on the top and front. A soft Merino wool blend fabric over the ears and on the back wicks moisture and helps regulate body temperature. The low-cut front covers the forehead, eliminating the cold gap between eyewear and helmets. Flat-seam, double-layer construction Wind-stopper soft shell fabric on dome Breathable Merino wool blend over ears and back of dome for breathability Ear opening accommodates sunglass arms Helmet-friendly