The Rab Filament is a close-fitting beanie with minimised seams. It fits well under a climbing, skiing, or biking helmet, giving you an extra boost of warmth without the weight.Built with 94% recycled Thermic S fleece, it has stripes of high and low lofting fleece inside, providing warmth in a low bulk and breathable package, ideal for high energy ascents.MaterialsThermic S Fleece - Quick wicking and fast drying, this synthetic fleece fabric is highly efficient for intense mountain activities. The lightest in the Thermic family, with alternating stripes of low and high lofted fleece, improving breathability and reducing weight.FeaturesLightweight fabric with alternating stripes of high and low lofting fleece for warmth in low bulk package with increased air flowMinimised seamsEmbroided branding Rab Filament Beanie - Patriot Blue