Class 5 Hearing Protection. AS/NZS 1270:2002 Certified Product. May be used in noise up to 117dB. Use our Replacement Hygiene Kit Part No. 18-95-83007. Very light to wear, premium comfort. Height adjustable head band. Collapsible head band for easy storage and protection of foam cushions. Folding Style. Sold individually or 6 per carton.