These are 3M Peltor Optime 98 Earmuffs, which are high-quality, professional-grade hearing protector. Looking for top-rated industrial hearing protection? The 3M Peltor Optime 98 earmuffs (H9A over-the-head model) are the ultimate choice for reliable noise reduction. Engineered with a high 25 dB NRR (Noise Reduction Rating), these high-visibility yellow earmuffs effectively safeguard your hearing in high-decibel environments up to 98 dBA.