The Perfect Patch mouthpiece cushion is smaller than many others on the theory that too large a patch deadens vibrations from the mouthpiece, which takes away a minute amount of richness in the sound. Perfect Patch is the best clear mouthpiece cushion to protect your mouthpiece and the enamel on your teeth. The JodyJazz Black mouthpiece patch is thicker and larger than the Perfect Patch. This is for players who would like a softer, spongier feel and also who would like to cover more of the beak of the mouthpiece.