Zone3 Aeroforce-X Mens 3/4 Sleeve Top in Black/Grey | 2021 The new Zone3 Aeroforce-X Mens 3/4 Sleeve Top is ideal if you are looking for extra extra speed, once you have conquered the finish, triathlon is all about getting there faster. It is that notion that gave birth to our new Aeroforce-X range. Brand new for this year, featuring a collaboration with speedsuit specialist NOPINZ, to develop the one of the worlds fastest tri suit. Utilising the facilities at the Boardman performance centre, Aerocoach (Nopinz aerodynamic partner) performed extensive fabric, pattern layout and competitor tests to help us produce the fastest possible bike time, without sacrificing swim and run comfort. Features Aerodynamic fabric on the sleeves and side panels at optimum positioning for drag reduction. Low profile neckline for improved fit without chafing. Aero designed pockets for generous storage without affecting performance or increasing drag. ColdBlack coating for reduced IR absorption. Scientifically Tested: Fabric testing was performed by Aerocoach in the Boardman Centre wind tunnel and on the track at a speed of 40km/h to determine which fabric reduced the most amount of drag to improve cycle times Comfort: The ultra-lightweight breathable fabrics incorporate ColdBlack technology across the core to help regulate body temperature. Low Drag: To achieve faster bike splits requires a reduction in drag, the Aeroforce-X range achieves this with the optimum positioning of aerodynamic sleeves and side panels, as well specially designed aero pockets for endurance nutrition. Water Repellent: The addition of a water repellent coating helps to reduce drag in the water, adding extra speed and reducing fatigue before the bike.