Rapha Lightweight Sleeveless Base Layer Black Black Size:XS making even the longest climbs BF Apparel making even the longest climbs easy More compact design makes new electric components smaller and lighter FeaturesLightweight material Works to actively wick sweat away from skinTemperature regulation Regulates your body temperature in hot and humid conditionsVersatile performance Perfectly matched to a wide range of conditionsComfortable A soft and comfortable layer under your bibs and jersey prevents chafing when you sweatSpecificationsDetails:Lightweight and breathable fabric adds comfort and thermoregulationAnti bacterial and wicking treatments applied to the fabricMaterials:100% recycled polyester breathable and sweat wicking base layer for hot conditions