Designed for riding and racing in all conditions, the Merino Mesh Base Layer offers incredible breathability, exceptional moisture transfer and class-leading comfort. Wear beneath a thermal jersey and jacket in the winter or under a flyweight jersey in the height of summer for year-round performance. Made from a second generation merino-blend fabric, woven exclusively for Rapha, the higher merino content provides excellent moisture management and natural antibacterial qualities, with further ventilation guaranteed by the lightweight mesh structure. The Merino Mesh Base Layer is available with short or long sleeves, or no sleeves at all, and has a dropped tail for a great fit on the bike. It is finished with a Rapha logo tab on the chest.