The seat is a pretty molded unit of mixed carbon and Kevlar (so black and gold interwoven strands) with a very fat main pad he added after riding it bare just once and feeling every tiny bump in the road! The seat mounts on some little elastomer pads, but Jon says they have no apparent suspension effect whatsoever. He may even remove them completely to lower it a bit (though Tim thought the elastomers might have some small benefit in preventing or delaying stress cracking of the seat pan).