The Mesuochi Metal Back Vibe Ribbed features undulating contours that feel amazing as they rub in and out of your anus. The dildo diameter varies and there are nine vibration patterns to try (all controlled by a single button), ensuring your sessions are never boring. The vibrating anal dildo, which comes in a kinky cloudy see-through design, is fully waterproof and quiet. The metal material means you can chill or warm it, depending on your play preference.