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Mack's Maximum Protection Soft Foam Shooting Earplugs, 7 Pair with Travel Case - 33 dB Highest NRR - Comfortable Ear Plugs for Hunting, Tactical, Target, Skeet and Trap Shooting : Amazon.co.uk: Sports & Outdoors
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Ear Plugs, 1 pair, Noise Reduction Rating: 27dB
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Browning Hearing Protection for Shooting by Decibullz Custom-Molded Earbuds, 31-Decibel Noise Reduction Rating (NRR), Includes Lanyard and Travel Case : Amazon.co.uk: Sports & Outdoors
Snap on Ear Plugs YAPLUG50 - 26 Decibel Noise Reduction Rating (Box of 50) | eBay