For noise levels up to 105 dBA, these over-the-head earmuffs feature double-shell technology to provide effective hearing protection. Proprietary Twin-Cup™ design has soft, foam-filled earmuffs. Stainless steel headband distributes weight for low-pressure fit. Ear-cup pivot points that tilt for optimum comfort and efficiency. Liquid/foam filled earmuff cushions. Colour-coding to help match attenuation needs. NRR: 30 dB. CSA Class AL.