MRI-Safe Hearing Protective Earmuffs are very effective in reducing the high levels of noise produced by MRI systems. They help to protect MRI patients from hearing damage. MRI-Safe earmuffs have an adjustable headband to fit adults, teens and children. Each padded earpiece contains 2 layers of cellular foam to absorb additional noise. Earmuff is certified MRI SAFE totally free of any metal components and safe for all MRI scanners. Noise reduction rating of 20 dB.