content: High quality product. Thick plastic. Baby cannot slide the plastic cover over, but much easier for an adult to slide than trying to pull out those annoying plastic plug-in covers that then become a choking hazard.You don't need one of these on every single outlet, but if you have a place in your home where you will be plugging things in and out on a regular basis, this is great. My husband plugs in his laptop and works at the kitchen table - so we have one of these on the outlet by the table, which is a perfect example.