Material: Premium-grade TPR Safety: Latex-Free · Phthalate-Free · Body-Safe Noise Factor: Silent Features: 4 ring kit · Soft · Stretchy · Pull Tabs Waterproof: Yes Functions: Improved stamina · Thicker erections Lubricant type: Water-based only Size: S · 1.1",  M · 1.3",  L · 1.4"  ,  XL · 1.8"   The Easy Grip Constriction Ring Set is the perfect performance tool for any guy looking to improve all aspects of their sex life.  From lasting longer and prolonging climax to improved size and performance, these rings will help you get the job done.  After just one use, your partner will be wide-eyed in amazement. This 4-ring set includes varying-sized rings that are designed for all men of all sizes.