Abstract: A seat apparatus includes a rigid base adapted for selectively mounting on a seat post of a bicycle and includes an armature mount. A rigid armature has a rear end, a front end, and a central mounting portion adapted for fixing with the armature mount of the base. A saddle has a top side, a bottom side, a front end, and a rear end, the top side being adapted for receiving a person thereon in a seated position. A connecting element is fixed between the bottom side of the saddle and with the front end of the armature. A cushion is fixed between the bottom side of the saddle and the rear end of the armature and includes a top membrane, a bottom membrane, and at least one peripheral membrane all capturing a cushioning substance therebetween. The cushion maintains a minimum height when under compression.