Pump it up! Designed with a classic tapered shape for easy entry, this inflatable vibrating plug grows in size with every squeeze of the bulb. The expandable casing in strong, flexible silicone is hypoallergenic and velvety soft for the most pleasurable use. A quick-release air valve immediately returns the plug to its original size when held down, and can also be used incrementally to change the size of the plug during play ? experience a new sensation with every pump or release. The Deluxe Wonder Butt Plug's powerful multi-speed vibrations are operated via a simple push-button control for easy one-handed use.