We are very excited to introduce the all NEW Superbelt! This product has been in development for the last couple of years, and we are thrilled that there is finally a quality replacement belt for the Singer Featherweight. These new belts are much softer, allowing the motor to run much faster with less resistance. Because these belts allow the machines to work more efficiently, the motors are under less strain with normal sewing. This will extend the life of your 221 & 222 Featherweight motor.