An acrylic foam made with thousands of suction cups so small you can’t see them with the naked eye- you can use it over and over without losing any sticking power. It also won’t leave any kind of adhesive residue once removed.  If AIRSTIK loses its "stickiness" or it gets dusty or dirty, wiping it off with a damp cloth will easily remove the dust and restore the suction to new. Every AIRSTIK product is proudly designed, sourced, and handmade in the USA.