Ultraslim folding and neckband earmuffs provide reliable protection in most noise environments without the bulk and weight of a standard earmuff. Ideal for workers exposed to intermittent or low noise levels. The L0F earmuff folds down to less than 4" wide, while the L0N neckband fits well underneath welding helmets. Tested to ANSI S3.19-1974. CSA Z94.2 Certified.