Regular use of the Deluxe Kegel Balls will strengthen your pelvic floor, make you tighter and give you better orgasms. Smooth silicone coating along with water-based lube will make for easy insertion. Movement and exercise whilst using these Kegel balls gives you nothing but pleasure, there are weights inside the balls that will bounce inside when you move and stimulate the vagina walls. Kegel muscle exercises are a great way to help control urinary incontinence. Lube: Please use water-based or silicone-based lubricants. Do not use oil. Cleaning instructions: Clean with soap and water.