1- Made of PP shell 2- could be fitted with 4-point or 6-point suspension. 3- With universal slotted holes on both sides to attach slotted type ear muffs. 4- Good for protection against falling objects. 5- Fit head size: 55 ~ 62cm. 6- Chin strap sold separate. 7- pass CE EN397 / ANSI Z89.1 Shell options : (1) PP (2) color: White, Yellow, Blue, Red, Green, Orange Suspension options : (1) 4-point PE pin-lock suspension (2) 4-point PE ratchet suspension (3) 4-point Nylon pin-lock suspension (4) 4-point Nylon ratchet suspension (5) 6-point PE pin-lock suspension (6) 6-point PE ratchet suspension (7) 6-point Nylon pin-lock suspension (8) 6-point Nylon ratchet suspension