[BJ type helmet made by high quality ABS. Hard Polymer Construction-The helmet is Fit for the Person Who Head Circumference is 22.4-23.5in. Occ-Dial Adjustable Fit Band with Replaceable Leather Front Nape and Side Pads Quickly Detaches to Allow Convenient Donning and Doffing of COMMs Headsets with Internal Top Headbands. It is about 1.23lb Lightweight multi-impact ventilated liner with repositionable impact pads and Holes for ventilationHelmet is a lightweight fully adjustable helmet perfect for just about any outdoor Applications. The lightweight design means that you will grow less fatigued from carrying a helmet on your head and still retain the same amount of protection necessary for high intensity outdoor activities. Great for Airsoft CS Game and other outdoor activities.]