Most fabricsespecially dark coloursheat up & grow uncomfortably warm in the hot sun. Not anymore. Revolutionary coldblack technology makes dark colours act more like light colours and light colours act like nothing else. It also has the benefit of protecting your skin from sun damage.Revolutionary coldblack technology reflects IR & heat rays so even dark colour dont get as hotFeatures: UPF 30 protects your skin from the sun's harmful rays Yarn dyed fabric is stretchy light & breathable so it can handle the hottest days Moisture Transport System wicks sweat & dries fast Anti odour technology prevents the growth of odour causing microbes Self fabric collar Performance fit 185g Polyester/Elastane