The b-Vibe Anal Dilators Set consists of 4 small-to-large size, body-safe glass plugs designed specifically to open and relax the anal sphincter and rectum- a process that is often referred to as anal training. These progressively larger backdoor dilators can be used in preparation of any booty play, to facilitate pleasurable anal sex or simply for added sensation. Whether you are new to anal play or a seasoned connoisseur, each tapered butt plug is shaped for easy insertion, while the flared base of the plugs provides maximum comfortability for extended wear.