Santini focused on two things when it designed the Photon Aero Jersey: aerodynamics and comfort during hot weather rides. The Photon Aero's synthetic fabric closely follows the contours of your body for excellent aerodynamics, and its ultra lightweight, breathable fabric protects your body from the sun's rays while it dumps heat. The lightweight, breathable Artico front panel keeps you comfortable when you're riding hard on hot summer days, while the LycraKa uses a special micromesh Lycra for improved elasticity when you're in the tuck position. Santini also integrated carbon infused side panels with natural antibacterial properties to help manage odors. These panels are also resistant to the sun's harmful UV rays. On the backside of this aerodynamic jersey, you'll find a two compartment pocket for easy storage and retrieval of energy gels and water bottles. Anti sliding elastic bands at the cuffs and hem provide a secure fit, also enhancing the jersey's aerodynamic, skin suit effect. Note that Santini recommends this jersey for temperatures ranging from 64 to 95 degrees Fahrenheit, making it ideal for warm spring and summer rides.