The Flexi-Fit has a unique squeeze flex action and adjustable prongs so that it fits securely on to the toilet seat. Adult toilet seats come in many shapes and sizes. However, most toilet training seats have no size adjustments so they can wobble around and make the child feel uncomfortable and insecure. The Flex-Fit's clever design allows you to adjust it once for each toilet for a great secure fit. It won't wobble about when the child sits down and it is quick and easy to squeeze on and off the toilet when necessary. The Flexi-Fit comes in a stylish but discreet white with a blue rubber trim. Age from 18 months to 4 years.