Designed for demanding cyclists and for those who ride a lot, the Free Aero Race 4 cycling short is Castelli's high end cycling short. This model has been refined each year since in was first introduced in 2007. The goal here was to create the fastest cycling short, so Castelli has used the best fabric to cheat the wind.
The 2019 model features a new leg gripper that still features a lie-flat raw-cut edge but now has vertical silicone stripes to keep it in place without restricting stretch. The updated seams improve the fit and make the shorts look even better. It features the new Progetto X2 Air Seamless seat pad with the softest surface fabric you've ever felt.
Vortex dimpled fabric on legs for aero performance
Forza fabric on inner legs with 38% Lycra® content for perfect fit
Giro4 leg gripper elastic for better grip distributed over larger area
Doppio V construction in front for increased support and comfort
Progetto X2 Air Seamless seat pad