Fully adjustable head harness with high density polyethylene shell. Clear polycarbonate visor, also available separately. Ear defenders, SNR Rating 25.9dB. Supplied with fitting and adjustment instructions. Carton packed. Helmet conforms to EN 397 SpecificationsEar Defenders conform to PR EN 352-3 SpecificationsVisor conforms to EN 166-3B/EN 1731 F Specifications