Our men's Climatise II Long Sleeve Base Layer uses a special blend of polyester and carbon bamboo fibres to keep you warm and dry. The unique combination of synthetic and natural gives superior wicking performance and has natural anti-bacterial qualities for long lasting comfort. BODY carbon base layer - 65% polyester/ 35% bamboo Natural wicking and anti-bacterial odour control properties Quick drying Thermal properties 51% Polyester 49% Bamboo