Hard Shell: Humane Restraint Hard Shell Protective Helmets reduce the risk of head injury and are comfortable to wear. Commonly used to prevent self-injury in correctional environments. The strong polyethylene shell with ventilation holes covers a shock absorbent foam liner. Chin strap is easily adjustable and snaps closed. Hard shell helmet can be equipped with either a face bar or shield. Weighs 17 ounces. Soft Shell: Humane Restraint Soft Shell Protective Helmets reduce the risk of head injury and are comfortable to wear. Commonly used to prevent self-injury in correctional environments. Lightweight foam full-coverage helmet includes ventilation holes and is designed to cover the temporal cheek area as well as providing additional coverage around the ears and nape of the neck. Chin strap is easily adjustable and snaps closed. ALL SALES FINAL...NO RETURNS