All Loop products have a declaration of conformity and are in compliance with the law for PPE (personal protective equipment). They are tested extensively by official authorities and are officially certified as hearing protection. The certifications that our products comply with are the following:EU Certification Standard: EN 352-2:2020US Certification Standard: ANSI S3.19-1974 (ASA STD 1-1975)Loop Quiet US Declaration of ConformityEU Declaration of ConformityLoop ExperienceUS Declaration of ConformityEU Declaration of ConformityLoop Experience ProUS Declaration of ConformityEU Declaration of Conformity