Premium Silicone for all the right reasons. It's hypo-allergenic, easy to clean (dishwasher-safe) and 100% phthalate free. It warms quickly to your body's temperature and retains heat. Its firm yet flexible, durable, odour-free and has an amazingly life-like feel. What could be better? It's made to the exacting and consistent standards of Doc Johnson, the industry's leader.