Perform like the stud you are! These Stay Hard Cock Rings come in 3 sizes, so you can use them individually or all 3 at once. The Small Ring is for maximum erections. Medium Ring is for hard erections; Large Ring can be used to encircle the upper part of your scrotum to help prevent premature ejaculation. They are made of Elastomer, a super stretchy, comfortable and Phthalate Free material developed specifically for your safety and hygiene during your intimate play.