Comfortable kiss air² back cover all day. Affinity pro lycra fabric in the inner legs for added elasticity and muscle support. Vortex blc fabric on the legs for improved aerodynamics. Round leg bottom4 with silicone strips for better grip to the leg spread over a larger surface. Flat seams. Reflective details on the back. Mesh braces for comfort and breathability. the thrill of the competition. We have made this shorts to incorporate as much technology as possible from our top of the range shorts used by professionals but at a more affordable price. And although it is certainly ready for race weekends, it is a shorts that also guarantees great comfort and performance even when you don't put a number on your back. The vortex main fabric and the non-slip gyro 4 on the leg come directly from our aero race 4 top shorts, while the kiss air² caseback has much of the comfort of our best bottoms. The intangible appearance you will appreciate the most is the ability to make it with a perfect fit, thanks to the model developed by the castle team. This is the shorts that takes the best of the know-how of castles in creating shorts that guarantee maximum comfort and performance but making it an accessible product for your cycling wardrobe.