High resistance, high temperature thermoplastic shell with polyurethane paint, to provide optimal shock and penetration performance. Quick adjustment Ratchet System, for easy setting of head size while the helmet is on the head, even with a gloved hand. Retention system with 3 point high comfort chinstrap including chincup, and several adjustment points for optimized stability whatever head size and morphology of the wearer. Attachment points for additionnal equipment used in various types of operations : ear protection, face protection (mesh visor or polycarbonate clear screen), high performance lamps, full face mask. Retroreflective stickers increase visibility in tough conditions, with the possibility to fully customize the helmet thanks to printed stickers.