This product is designed to help the pilot perfectly train for instrument conditions. This restricts the view of the user in a way that only allows vision to the instruments inside the cockpit. It comes with a one size fits all build so that it can accommodate users if all face sizes with its adjustable temples. It also comes with a carry case so that the user can protect them in their flight bag and extend the life of the product. They are designed with strong plastic so that they can be used over long durations and flights without discomfort. They are tested and used by pilots to simulate IFR conditions and will work perfectly for any student or pilot looking to get practice "under the hood." These work well for logging simulated instrument conditions with a safety pilot during instrument training towards your instrument rating, or when you are looking to log instrument approaches for instrument currency as long as you are with a safety pilot. You must only use these in any aircraft only if you are with an appropriately rated safety pilot.