That extra one or two percent can matter, so Santini designed the Photon 2. 0 34 Sleeve Men's Jersey to give you every advantage when you're trying to shave precious seconds off your finish time. To help you slice through the air, Santini constructs the Photon 2. 0 from Artico, a super sleek and stretchy polyester that hugs your body and breathes exceptionally well. The aerodynamic fit is further guaranteed by the cuffs and hem, which incorporate a non slip elastic that also enhances the jersey's comfort. Short sleeves can interfere with aerodynamics by creating transition ridges while long sleeves can be too warm, so Santini compromised by giving the Photon 34 length sleeves, which improve the jersey's aerodynamic properties, help you stay cool, and protect your arms from the sun. Even more uniquely, carbon infused panels wrap around the back, sides, and chest for muscle support and odor resistant properties. Final touches include three rear pockets for bottles and gels and a reflective back logo that helps you stay visible during dawn and dusk rides.