Made from non-abrasive, HDPE plastic, the CatTongue phone grip is waterproof, eco-friendly, and allergy-and-irritant free. AND it’s made in the USA by a WBENC certified supplier. Can’t get better than that! The CatTongue non-slip phone grips adhere to any slick surface and won’t interfere with wireless chargers or magnetic mounts. *Please note that we do not recommend CatTongue Grips for mobile cases that are made out of leather, suede or fabric.