PROHEAR Electronic Ear Protection for Shooting with 4X Sound Amplification, Gun Range Hearing Protection Muffs, NRR 23dB Noise Reduction Headphones for Hunting, Black - Amazon.com
3M Peltor H6P3E/V Optime 95 Helmet Attachable Earmuff, Hearing Protection, Ear Protectors, NRR 21dB, Ideal for machine shops and power tools: Amazon.com: Tools & Home Improvement
Amazon.com: PROHEAR 016 Shooting Ear Protection Earmuffs 2 Pack, NRR 26dB for Gun Range, Hunting -Black and Green : Sports & Outdoors