Material: Premium-grade silicone Safety: Latex-Free · Phthalate-Free · Non-Porous Noise Factor: Silent Features: 3 ring kit · Soft · Stretchy · XL Thick Waterproof: Yes Functions: Improved stamina · Thicker erections Lubricant type: Water-based only Size: S · 0.75", M · .875", L · 1"   With Lynk Cock Rings, you can kick up your performance for the long haul, and stop leaving your partner frustrated. No matter if you are using them with a penis pump or just with your partner, the Loop XL cock rings will provide the support needed for greater sex and pleasure. By restricting the blood flow to your erection, you will last longer and improve your performance for long nights of fun.  These medical-grade silicone rings are specifically designed with an added thickness that adds to the comfort and creates unique and fun choices on how to use them.  From ball stretching to girth enhancing, the Loop XL set will be your new go-to cock ring set.