Patented 3M Pressure Diffusion Technology incorporates self-adjusting front paddles along your forehead Suspension flexes and self-adjusts, reducing forehead pressure and increasing comfort for all-day wear Smooth-turning 4-point ratchet suspension system for custom, on-head sizing Suspension sits low on the head to increase comfort and security Customize your fit with multiple levels of height and head-shape adjustments Fits hat sizes 6 OE to 8 (50 to 64cm head circumference) Breathable, washable sweatband to help keep you cool and dry Full brim model helps protect neck and ears from UV rays Non-vented hard hat meets ANSI Z89.1/CSA Z94.1 Type I, Class G and E requirements