Material: Premium-grade silicone Safety: Latex-Free · Phthalate-Free · Non-Porous Noise Factor: Silent Features: 3 ring kit · Soft · Stretchy Waterproof: Yes Functions: Improved stamina · Thicker erections Lubricant type: Water-based only Size: S · .875",  M · 1",  L · 1.125"   With the Lynk Loop cock ring set you can instantly improve your sexual performance, and stop leaving your partner frustrated. This medical-grade silicone constriction ring set includes 3 rings designed to help you last longer and stay harder. The Loop cock ring set includes 3 graduating sizes to ensure the perfect fit for all men. Get creative with your placement as they are great for balls, shaft, or any combination of them.  With a high-quality silky smooth finish, these rings are as comfortable as any rings available.  Made in blue and black for that masculine touch.