An extendable seat base for a seat of a vehicle is disclosed. The seat base includes an outer cushion, a cord, and a motor. The outer cushion forms a top of the seat base and extends, in one unitarily formed piece, down a front of the seat base and back underneath or within the seat base, such that excess material of the outer cushion is positioned underneath or within the seat base. The cord is connected to an end of the outer cushion at the excess material. The motor is adapted to pull the excess material underneath or within the seat base while the seat base is in a retracted position and to release the excess material while the seat base is in an extended position. At least a portion of the excess material is used to form part of an extended seat for a vehicle occupant while the seat base is in the extended position.