Fit validation forms an essential part of an overall workplace protection programme. It is intended to help the wearer select the right product/size and train in the correct usage to ensure an appropriate level of protection against workplace hazard(s). The principles of fit validation can be applied to any item of PPE, however recognized fit validation methods (fit tests) are commonly used for tight-fitting respirators, hearing protection and eyewear.
Fit validation can be performed by either the simple fit check method or a fit test method. Fit check is a very simple method to check if the PPE is positioned correctly on the wearer - it does not indicate the level of protection achieved by the wearer.