Tranquility - TopLiner Booster Incontinence Underpads are an economical way to extend the effectiveness of an adult diaper or adult pull-up. The Booster pad lines the inside of the protective diaper or brief, where it absorbs fluid. These underpads provide added protection against leakage, odor and skin irritation. The Topliner works with any adult incontinence product to give added confidence and protection. Latex free.