Peltor 3M X5A Ear Defenders with Headband, Black & 3M Optime I, H510AC1, Ear Muffs Headband, Lightweight Ear defenders, Hearing Protection reduces noise level by up to 27dB, Pack of 1 :
3M Peltor X5A Ear Defenders with Headband, Earmuffs for Reliable Hearing Protection Against High Noise Levels in Industrial Settings, 37 dB, Black : Amazon.co.uk: DIY & Tools
Peltor 3M X5A Ear Defenders with Headband, 37 dB, Black & 3M X2AC1 X2 Earmuff; Ear Defender, Hearing Protection against noise levels in the range of 94-105 dB (SNR: 31dB) : Amazon.co.uk: