WeatherX™ earplugs are a pressure filtering earplug designed for shifts in weather pressure. Receive a push notification from the free app and be proactive about drastic shifts in barometric pressure, that have been known to trigger migraines Weather Headache Support Free WeatherX App Forecasts Shifts in Barometric Pressure; Download for Free on iOS and Android devices Guaranteed or Your Money Back Drug-Free & Latex Free Reusable Patented System of Technology Noise Reduction Rating of 20 Decibels This listing is for one pair of WeatherX Ear Plugs.