Important! For proper fit, ear cushions should seal firmly against the head. Anything that interferes with the seal such as long hair (pull back to the extent possible), thick or poorly fitting eyeglass temples, pencils or caps will lessen the earmuff's effectiveness. Do not over-bend and reshape the headband as this will cause a loose fit and sound leakage. Fitting Instructions Improper fit of this device will reduce its effectiveness. Fit your earmuff before entering a hazardous noise area. Place the earmuff on the head with the band at the crown (top) of the head Pull out the cups and place the hearing protector over your ears so that the ear cushions fit snugly It is important that the cups fully enclose the ears and that the cushions exert equal pressure around the ears Adjust the height of both cups for comfort and a good seal – do this by sliding the cup up or down while holding the headband in place