What is a Waterproof Light Switch?

What is a waterproof light switch?
If you need to control lights, water features, gates or other outdoor devices in damp or wet locations, you'll need a light switch that meets NEC requirements. These switches are fully rated for wet locations and are protected from moisture by an internal bellows gasket that suctions to the subplate to safeguard the contacts, spring, and other components of the switch. Some switches have an aesthetically pleasing flip lid cover while others are mounted inside a box or four-screw cover to be installed in new construction or in the wall of an existing outdoor living space.