Whether you're pursuing an instrument rating or just want to brush up on your instrument scan, these Training Foggles are an outstanding tool for honing your IFR skills under simulated conditions. Both lightweight and durable, these polycarbonate lenses fit just like regular eyeglasses for a familiar, comfortable fit. The lenses are partially frosted over in a manner that provides you full view of the instrument panel while blocking outside visual references. An immensely popular, time-tested tool that's been a favorite of CFIIs and IFR candidates for decades.