my Mistress loves this wide open gag to fit on me for forced oral sessions. The soft silicone lips are very comfortable to wear and highly effective in keeping my mouth completely wide open, with me vulnerabe and no option to other than always fully accept whatever is presented to me. It definitely prevents me from either resisting or even biting. The straps firmly secure it in place, so there s no room for moving out of position, no matter what my Mistress decides are the circumstances for its use.