Moldex Meteors earplugs have a unique curved design to provide exceptional comfort. The contours follow the shape of the ear canal, which means less pressure at the smallest diameter of the earplug. Meteors innovative undercut design affords a secure fit, all day long. The large base helps provide proper insertion, fit and removal. Plus, they have the highest independently tested NRR 33dB rating available, making them suitable for most noisy environments. Their bright green color allows for easy compliance checks, and they are independently tested to ANSI S3.19-1974 standards.