TIPS for using the shower foot scrubber. 1.Some may find the shower massager mat ticklish and may need some getting used to. 2.The suction cups of the shower mat works best on smooth surface as opposed to tiled or textured shower floor. 3.Soap bars generally generate more soap suds than shampoo. 4.This mat is machine washable, hang dry after cleaning. 5.For safety's sake, please scrub you feet one at a time and make sure the mat stick to your shower floor or bath tub properly before using. TIPS for using the adhesive hook. 1.The hook works best when the target surface's been cleaned and dried. 2.Peel the back off and stick it to the pre-cleaned surface. Material: PVC Product Dimensions: 11.8 * 9.5 * 1.8 inches PACKAGE INCLUDES: A green shower foot scrubber and an adhesive hook.