Using a special two-part construction, each Pot Pad™ is made of a hard plastic dome and a non-skid rubber grip pad. Pot Pads™ grip the underside of the pot, creating a small point of contact on the deck. Great alternative to saucers for pots. Using Pot Pads™ also elevates the plant off of the deck surface to enable aeration and draining. Unlike other products, Pot Pads™ suction to the bottom of the pot, allowing for easy movement of pots on hard surfaces. Think furniture mover pads for pots!