1.ANSI,CE or CSA approved; 2.H style rib for impact; 3.6 point suspension; 4.Could be connected with ear muff;

This  kind of hard hat has following feature:

Material:ABS or PP

Rib:H type with Air vents

Headband and tin chip:Polyester

Rachet headband for size adjustment

Size:55-61cm

ABS Hard Hat ANSI Z89.1