This is the ultimate evolution of the merino base layer, now lighter, more durable, and engineered for high-output performance in any condition. Experience superior thermoregulation and next-to-skin comfort thanks to a fully redeveloped, high-merino content blend and updated fit. Key Features: Fully redeveloped - material composition is more breathable, durable and lighter while maintaining high merino content Performance merino - new design reduces bulk and moisture retention as well as adding strength and durability Updated fit - additional elastane brings the base layer closer to the body for improved comfort and wider compatibility with Rapha jerseys Natural protection - Naturally anti-bacterial, itch-free, and odour-resistant for lasting comfort Thermoregulation - Excellent temperature regulation across changing conditions Moisture management - Exceptional moisture transfer for a dry and comfortable feel