SNR=21dB. Vented ABS impact-resistant helmet with 6 point cradle. Features wheel ratchet adjustment for optimum fit, and padded brow strap for security and comfort. Integral adjustable flip-up ear defenders with hearing protection levels H=25dB, M=22dB, L=15dB and SNR=21dB. Includes removable full face 200 x 300mm wire mesh visor, with multi-position click-stop mounting. Ideal head protection for users of chainsaws, hedge trimmers and strimmers. Cradle fits head circumferences 500 - 600mm. Conforms to EN352-3, EN397 and EN1731.