Saddleback has announced the launch of Castelli’s Free Aero Race 4 bibshort, redesigned for 2019.
It is the latest evolution of Castelli’s original Aero Race bibshort, which launched in 2007.
The Italian brand’s research and development team worked closely with Team Sky riders, visiting the squad in Belgium, Nice, Manchester and Italy to get training and racing feedback. The resulting bibshort features some "dramatic, performance-enhancing changes".
It has been "completely re-engineered" to improve the short’s performance. New Vortex dimpled fabric discourages air attachment so that it flows "cleanly off the back" of riders’ legs.
To ensure compression is only applied where needed, Castelli has overhauled the short’s leg Grippers. The new Giro4 design features a lie-flat raw-cut edge with vertical silicone stripes.
The inner legs feature Forza fabric for a "smooth, snug, unrestrictive" fit thanks to 38% Lycra content. Castelli has also redesigned the short’s panelling with the new Doppio V construction, improving fit and support.
The bib straps have been reengineered with new "lighter, more breathable" material. This results in better moisture transfer to "keep you cooler and drier while lying flatter for even more of a forget-it’s-there feel".
There’s also a lie-flat race radio pocket on the rear and a new loop for the radio’s microphone.
The bibshort also incorporates Castelli’s brand new Progetto X2 Air Seamless seat pad, which features a two-piece design. The upper layer is dimpled to reduce full skin contact, encouraging air to drive moisture away from the body.
Castelli has also developed the Castelli Free Aero Race 4 W, a pro-level women’s-specific short available in two styles, with and without bib straps.