Ollieroo Bath Mat For Kids PVC Cartoon No Slip Bathtub Shower Mat with Too Hot Indicator White 27.5&rdquo; X15.7&rdquo; first, please clear the tub and mat, <span class="a-text-bold">then wipe them dry</span> Second, please put the mat which with many little sucker to the tub bottom The last, please stand on the mat and try to make all the air out and then the mat may suction to the tub