Every now and then a customer calls and says their erection gets flaccid right after they remove the cylinder. If a cock ring was used, this may not have happened therefore a constriction band is the most suggested accessory.

(Q.) What are cock rings for?
(A.) The constricting ring helps to keep your erection firm. Some men need them, some men don't. If you have erectile dysfunction, or low blood pressure, more than likely you will require one to prevent you from immediately becoming flaccid. It can also help to prevent premature ejaculation so all men benefit from wearing a penis ring regardless of ED problems. The beaded prolong cock ring is the best at maintaining an erection.Another style is the double cock ring. The smaller band goes around the shaft and the larger band goes around the testicles. This style holds your erection higher and gives the illusion of a larger penis. It also helps to prevent premature ejaculation better than the single ring.
Some men find the double rings to be sexually pleasurable. Vibrating cock rings are more for pleasure than erection support as they tend not to fit very tightly. The pleasure for you and your partner is a very fun addition to your sex life.