There's a lot of technology in the Entrata Jersey. Although this is technically the entry level jersey in the Castelli collection, it has been designed to incorporate as much competition level performance as possible, whilst offering unrivaled value.   With its one-piece sleeves with optimized seams to promote aerodynamics, it benefits from the know-how acquired in this area by Castelli's Research & Development department in real racing conditions. It's not only aerodynamic, it's also more comfortable thanks to the 4-way stretch Air Mesh fabric and the unhemmed sleeves that are elasticated to fit all arms without ever constricting them.   The model's body fabric is the perfect thickness so you don't overheat, while ProSecco treatment wicks away moisture to keep you dry. It is stretchy for a perfectly adjusted fit and provides UPF 30 sun protection, filtering out 97% of UV rays.   This well-designed model is packed with functional details, such as the stretch panel in the central pocket, the highly reflective panel on the pocket, the YKK® Vislon® zipper that slides easily over the entire length and the elastic support band silicone so that the back of the jersey stays in place.   Features The body of the model is made of ProSecco fabric made in Italy with hydrophilic treatment to evacuate moisture. With their modified raglan shape, the Air Mesh sleeves guarantee more comfort and better aerodynamics. The sleeves without hem remain flat and do not constrict never. YKK® Vislon® zipper that glides smoothly over the entire length. 3 x rear pockets, with central pocket with additional stretch yoke and reflective panel. Silicone elastic waistband.