Sdg bel air rl ti alloy collection saddlebel air saddles are the modern classics providing ultimate comfort support and control the bel air uses a resilient polypropylene base that allows extra flex on the edges through each pedal stroke and incorporates a base bridge for stiffness and ideal power transfer the bel air uses a mid density pu foam and is strategically designed with a rear rise which helps rotate the pelvis forward and can provide extra support for one who likes to use the sadd