This skull liner provides awesome warmth, wicking, and wind block in a thin and lightweight design. Crafted with Dynamax™ material, it features an incredibly soft feel with superior protection. The exclusive dual-density material, with micro denier hollow-core technology, is warm enough to wear alone yet thin enough to layer under hats or helmets. Completed with reflective accents so you stay visible in any light or weather conditions, making it the perfect all-weather companion for outdoor adventures.