As the other Romance toys, the penis ring Ivy is classy and romantic on the outside, and full of technology on the inside. The penis ring has a smooth anti slip ring that is stretchy to fit comfortably around the penis and a diamond shaped texture on the upper part to stimulate the clitoris during intercourse. Ivy is made of soft, food grade silicone, offers 3 speeds and 7 vibrating passion rhythms, while being fully waterproof and easily rechargeable with USB. Material: Silicone/ABS. Inner diam: 2,5cm. Outer diam: 4cm.