Simply stretch the Ring Os tightly around your penis and testicles and position it directly at the base of the package the snug fit is what helps restrict blood flow to the penis, which is how it helps keep it harder for longer. Users also may feel more sensitive, a heightened sense of pleasure, and some Ring Os fans experience more powerful orgasms. Ring Os are also reusable just give them a wash with soap and warm water and enjoy one of the best adult toys on the market! Made using body safe SEBS silicone.