Ouch! Glow in the Dark. the future of bondage is here. Designed with an authentic bondage aesthetic. but with the added delight of the glow-in-the-dark properties. the fluorescent green detailing will turn every event into a part. With Ouch! Glow in the Dark. the fun is just beginning when the lights go out.This cock ring set contains three sized rings that are comfortable and stretchy. The rings will improve your sexual performance and bring you tons of possibilities because of its flexibility. Ouch!?Glow-In-The-Dark?products must be activated with the sunlight before enjoying it in the dark.- Product weight: 7 gram- Waterproof: Yes- Splashproof: Yes- Phthalate free: Yes- Materials: SiliconeSpecificationsDimensions Small RingL x W x H: 3 x 3 x 0.3 cmInner Diameter: 2.2 cmDimensions Medium RingL x W x H: 3.5 x 3.5 x 0.4 cmInner Diameter: 2.7 cmDimensions Large RingL x W x H: 4 x 4 x 0.5 cmInner Diameter: 3.2 cm