The uVIBE U-RING is a super-safe, stretchy enhancement ring designed to comfortably fit all sizes and help maintain a firmer and fuller erection during sex. The added pleasure knobs help provide a tighter and more secure fit. By constricting blood flow and keeping blood in the shaft of the penis, the specially designed URING helps to keep the erection harder and firmer for a longer period of time. Users will also experience a more powerful orgasmic release while using the U-RING.