A jockstrap (or similar)

plural of athletic protector

A clear plastic sleeve for documents.

An appliance designed to protect electrical devices from voltage spikes by limiting the voltage supplied to an electric device by either blocking or by shorting to ground any unwanted voltages above a safe threshold.

plural of earthquake protector

(earthquake engineering) A sliding type of low friction base isolation for protection of building structures against lateral impact of strong earthquakes.

An item of removable bedding that sits on top of or encases a mattress to protect it from stains and sometimes to protect the sleeper from allergens and irritants.

plural of screen protector

An additional sheet of material, commonly polyurethane or glass, that can be attached to the screen of an electronic device to protect it against physical damage.

plural of surge protector