Cloud 9 Pro Sensual Pro Rings Donuts 2 Pack. This innovative Performance Donut Cock ring is designed to help enhance erection and optimize staying power. This unique Donut shaped cock ring features two sizes for training. Wear one or two based on your own preference. Performance Cock Rings are soft and stretchy to fit any man and stimulate your partner. Designed to fit for a tailored, snug fit without pinching during use. Increase your erection size and heighten sensitivity during sex and solo play with this stretchy cock ring set. Do not use silicone based lubes. Made from latex and phthalate free premium silicone. Extra thick seamless design for comfort. Features: comfortable soft Liquid Silicone. Performance Donut Rings are soft and stretchy. Designed to fit for a tailored, snug fit. Body safe Latex free, Phthalate free Silicone. Do not wear a cock ring for more than 30 minutes. Cock rings give you a longer lasting erection by trapping the blood supply in the penis and intensify orgasms. Cock rings are ideal for men with premature ejaculation or erectile dysfunction. Sizes small ring 12mm by 42mm e or approximately .47 inch by 1.65 inches. Larger ring 14mm by 51mm e or approximately .55 inch by 2.00 inches.