Sticky mat that catches dirt and dust from shoes, wheels etc. Placed, for example, at the entrance to clean rooms, ESD rooms or other controlled environments. The mats are easily attached to the floor or to a frame with double-sided tape. A transparent protective layer protects the top part of the adhesive mat until it is ready for use. The corner tabs are sequentially numbered to show the number of sheets remaining and help prevent multiple sheets from being removed at once.