3M H520AC1 Peltor Optime II Comfort Earmuffs, Black, (94-105 dB) & 3M Peltor Optime I Earmuff H510A; Hearing Protection against noise levels in the range of 87-98 dB (SNR 27dB), yellow :
Peltor 3M Earmuffs X4A with Headband–Reliable Protection Against Medium Levels of Noise in Industrial Settings, 33 dB, Green & 3M X2AC1 X2 Earmuff; Ear Defender, Pack of 1, Black/Yellow : Amazon.co.uk: DIY
3M™ PELTOR™ SoundTrap™ Slimline Earmuff MT15H67FB, Tactical Electronic Headset Headband, 1 EA | 3M United States