ANTARES Low-profile performance saddle designed to allow a more connected feeling for optimal pedaling efficiency and power transfer R5 Combination of a ride-compliant, carbon-reinforced nylon shell and an S-Alloy rail WINGFLEX The shell's side edges flex and adapt to the rider's inner leg movement DOUBLE-DENSITY FOAM Firmer on the ischial bones, softer on the nose, for optimal comfort in every riding position