Set Of 3 Silicone Stacker Rings from Cal Exotics. The Set of 3 Silicone Stacker Rings will transform uncomfortable penetration into a truly plush and comfortable experience. The flexible cock rings can be stacked or used independently to help control and customize depth of penetration. These customization silicone ring stack fit snuggly on you to provide a soft, pillow-y cushion for your partner. The stretchy rings give you total control of penetration depth for ultimate in comfortable penetration. Three soft, stretchy silicone rings let you to easily control and customize the depth of penetration. The ultra stretchy sleeve is made from a phthalate free, body safe Silicone to ensure peace of mind through every passionate moment. This durable rings are easy to use, easy to clean and requires no special care. Prior to and after each use, wash rings internally and externally with warm water and soap, then disinfect with the Universal Toy Cleaner. Specifications: Color Clear. Materials Silicone. Features Phthalate free. 90 day warranty.