THE SHORT THAT REVOLUTIONIZED CYCLING SHORTSIn 2007 Castelli introduced the Free Bibshort. It revolutionized cycling shorts with the incredible feeling of freedom it provided. The flat raw-edge Giro leg band & the minimalist Free bib construction have since shown up on virtually every high-end short in the market. & the Free became the best-selling short in Castelli history. Vortex dimpled fabric on legs for aero performance Forza fabric on inner legs with 38% Lycra® content for perfect fit Carré engineered lie-flat bib strap construction for minimal coverage maximum comfort Giro Air mesh-like leg gripper elastic for better grip distributed over larger area Doppio V construction in front for increased support & comfort Flat-lock stitching Reflective detailing on back New enhanced Progetto X2 Air seat pad for even greater comfort For 2015 weve re-engineered every detail of the Free while keeping everything you love. Our best race short is now both more comfortable & more aerodynamic. We wanted to make it perfect so we tore down every component of the Free: every fabric every construction method every stitch.MUSCLE SUPPORT & SPEEDIn re-engineering the Free we took a look at blood flow providing just the right muscle support without constricting. The revolutionary Giro Air leg band provides more stretch & distributes the compression over a larger area. The body of the short uses 30% Lycra® for excellent return. We also looked at aerodynamics optimizing boundary-layer airflow with the Giro Air leg band & the dimples on the side fabric. The wind tunnel says it saves 10 watts at 50 km/h but youll probably want to go even faster because your aero advantage will only increase.OBSESSION WITH COMFORTThe best race short must be supremely comfortable. The new fabrics are all softer than the outgoing fabrics especially the new softer surface fabric on the updated Progetto X2 Air seatpad. The innovative double V construction on the front keeps everything in place without compressing your stomach. & weve engineered a new Carré yoke that makes the straps lie perfectly flat. But the most important part of comfort is fit. As one of our pro testers said These shorts fit perfectly. They dont move around. Everything is just right. The 2015 Free Aero Race short. An unfair advantage.