Nexus Linesman our pioneering helmet combines advanced industrial safety standards with modern recreational styling including a 4-point quick release harness for added stability and comfort, with non-vented shell for improved electrical resistance. Linesman 4-Point EN 397 Harness providing additional wearer comfort and helmet stability. Harness side adjusters for improved wearer fit and comfort Premium Dry-Tech sweatband as standard for maximum comfort Micro peak for maximum upward visibility Unique rear shell design providing nape protection and freedom of movement EN 397: 1000V a.c (unvented shell only), LD, MM, -40C EN 50365. ANSI/ISEA Z89.1-2014 Type 1 Class C (Class E - unvented shell only), LT, -40C. CSA/CAN Z94.1-05 Type 1 Class C (Conductive 0V a.c.) Vented Ratchet version only CSA/CAN Z94.1-05 Type 1 Class E (20,000V a.c.) Non Vented Ratchet version only. Tested to the performance requirements of AS/NZS 1801:1997. 396g (Slip) 415g (Ratchet) Shell: Acrylonitrile-Butadiene-Styrene (ABS) Micro Peak - 20mm 6 point sewn durable and hardwearing Terylene webbing cradle, complete with Dry-Tech Sweatband S16E*RL Ratchet Non-Vented S16E*L Slip Non-Vented S16E*RLF Ratchet Vented S16E*LF Slip Vented S30*NHIRS (Nexus High Intensity Stickers - not fitted as standard) * Insert colour of stickers (i.e. S for Silver) S30LY (EN 397 Harness) S589 (Clear Moulded Spectacles) S589SE (Smoke Grey Moulded Spectacles) Colour Variations: White Blue Light Blue Red Yellow Orange Green Black Grey Hi-vis Yellow Hi-vis orange