McKeon Products, Inc. introduces the new Mack’s® Flightguard® Airplane Pressure Relief Earplugs, offering flyers a more comfortable flight experience by Mack's® Communications Team | Sep 11, 2017 | News | 0 comments Full Press Release Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Captcha *