The short fabrics are all white-based fabrics with sublimation printing over the top. Castelli incorporated titanium dioxide, the active ingredient in sunscreen, directly into the fabrics so that they reflect the sun's rays. Each part of the short features fabric that we feel is as open as possible while still providing some sun protection where necessary and avoiding transparency on the front and back.
But this short is not just about staying cool. There is an abrasion-resistant ballistic nylon fabric on the inside of the leg but knitted it with wicking polyester on the inside to keep you dry. The leg ending with GIRO3 elastic for a smooth interface between the leg and the short.
The Progetto X2 Air chamois delivers excellent breathability and features a soft, stretchy, seamless, bacteriostatic layer next to the skin that prevents chafing. A cushioning layer put the padding in just the right places being thin at the edges gradually increasing to maximum thickness underneath the sit bones. Additional perforated viscous padding is located underneath the ischial bones and the sensitive perineum area.