3M E-A-Rfit Accessory PackE-A-Rfit is a service program designed to help validate hearing protection and compliance with hearing protection fit testing. It delivers an objective, quantitative measurement of each employee's protection, so you can better protect your workforce while helping employees understand the importance of proper fit. With the E-A-Rfit Dual Ear validation system, your employees will learn how to properly fit their 3M earplug or earmuff, and you'll have the confidence that they are wearing the right protection for their environment.