Pro-level aero system for your bike split. The TEMPO! PRO Calf Sleeves were built for—and with—our elite athletes. First put to work at the 2025 Ironman World Championship in Nice by Magnus Ditlev, Daniel Bækkegaard, and Kristian Høgenhaug. Through endless rounds of both cylinder and rider testing, we engineered a new calf sleeve system with a wider aero profile that outperforms our original TEMPO! ONE. This is a two-piece system utilizing two French aero fabrics strategically positioned to slash total drag. The curved seam manages fabric stretch across different calf sizes, ensuring the technical zones stay exactly where they belong. The seam itself, along with its precise placement, acts as an aero trip to manipulate airflow around the lower leg. Built specifically to give you an aerodynamic edge when pushing past 40 km/h on the bike. For maximum efficiency, run it with the TEMPO! PRO Tri Suit.