The FR-C Pro Short Sleeve Doppio Tri Suit is inspired by the aero work done by professional road racers. The Doppio is a cross between a skin suit and separate jersey and shorts, taking the aerodynamics of the former and the comfort of the latter. The ridged fabric on the sleeves and front torso creates a more aerodynamic profile, which provides increased benefit on longer distances. This fabric is even more aero than skin, so if you’re looking for speed, the Tri Doppio is the ticket.