These earplugs are designed to protect your ears from excessive, loud noise. The ear plugs can protect your ears up to 26dB.Directions for use:Rub the small end of the earplug, pull the ear upward and put the small end into the ear until two-thirds is put into the ear, then push the other end until the whole part is well inside ear canal and earplug rebounds completely. Hold until plug completely expands.The NRR is 26 decibels(dB)EN Standard: EN352-2WARNING Keeping away from small children and infants.These earplug may interfere with breathing is caught in windpipe.