Cloud 9 Novelties Super Stretch Beaded Stay Hard Ring Clear Combo Pack includes three sizes of super soft skin safe rings. These ring can help you stay harder longer and prolong ejaculation. Cloud 9 cock rings are made of phthalate-free, non-toxic thermoplastic rubber (TPR). The smallest ring is for maximum erections; the medium ring is for harder erections; the large ring can encircle the upper part of your scrotum to help prevent premature ejaculation.