Three-quarter length sleeves give you a bit more protection, true, but their real benefit is psychological: they inexplicably look and feel faster. The Pearl Izumi Launch 3/4 Sleeve Jersey lives at the intersection of cool and fast. The droptail hem keeps your lower back covered, the thin material manages moisture, and the V-neck is a departure from ordinary crewnecks. Get this one if you like to go fast, stylishly.