Cloud 9 Novelties Super Stretch Donut Stay Hard Ring Combo Pack includes a trio 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 rings are comfortable and made specifically for your safety and hygiene during your intimate play. Cloud 9 cock rings can be used individually or together.