The latest glow in the dark technology! Designed to hug your entire package to give you a bigger bulge, this performance ring gets an ergo update with an additional knob that applies pressure bending the scrotum, slowing blood flow for a thicker, bigger erection and enhanced stamina, performance and confidence. The Rock Solid Tire Ring is made with firm, yet stretchy material and gently wraps around your package with a tight squeeze that accommodates most men.