Excellent heat retainer preventing heat loss from the head before, during & after activities. Light enough to be worn under a crash helmet. Reed Transpire fleece garments are designed to be worn as a baselayer next to the skin and will out-perform all others, even in extreme climates, on expedition, in sport or for leisure. Ultra warm - Ultra comfortable.  The fastest moisture-wicking fleece fabric available - keeping you warm when it’s cold, and dry if you get too warm. Great used for water and land based sports.  One size fits all.