The waterproof SEBS silicone RingO XL boasts the erection-enhancing power of the original RingO but with a bigger size for a better fit! This stretchy erection ring helps him stay harder longer with a fuller erection, mind-blowing orgasms, and can even prevent premature ejaculation. Stretch the RingO XL around the base of the penis for comfortable intimate enhancement an intensely better sex. Box of 18.