The aerodynamically constructed Sidi Cielo Aero Race Jersey saves time. After wind tunnel testing, it was discovered that the Cielo saves 12 watts at 40 km/h when compared to the industry-leading model. This is a fast cycling jersey. On the front and the shoulders of the Cielo jersey, Velocity Dry fabric dries almost instantly and its controlled stretch creates a smooth surface that is luxuriously comfortable. Nervato fabric at the armholes allows the cyclist unrestricted movement while keeping the jersey in place. The Nervato fabric has an open structure that promotes air flow to keep the rider cool and dry in the arm pits area.