This INGCO Safety Helmet made of abs shell, high hardness, reinforced chin strap material. Ventilation holes on both sides to avoid sultry for a long time wearing, light flow of air helping to keep cool and comfortable. Helmet with adjustable design, there is a regulator at the back of the helmet, manual adjustment of the head circumference. Urban construction, railway construction, leader inspection, customer inspection, oil exploitation, power engineering, working at height, etc. The HSH207 Safety Helmet will not cause any burden to the head during wearing, with a fabric soft and comfortable headband. Specifications: PE shell with vents Lining material: Plastic Chin strap included Color: Blue Weight:330g 8 point suspension Adjust head size by buckle