IST Proline ProEar Diving Mask - Black - ME55 Pressure Equalization, Ear Cuffs Has anyone used one of these masks? I was doing my checkout dives and saw someone wearing one. He didn’t speak English so I couldn’t ask more about it. If you have, does it work like it says it does? Does it help with equalizing, especially for someone with an eardrum that doesn’t exactly function properly as far as reacting to air pressure?