Special Features:

Composite carbon fiber and kevlar laminate; dual side audible altimeter ports; sky dial tightening mechanism to tighten forehead and neck areas; lined with eva type material and comfort liner of open call foam with felt-like coating

Properties:

A head covering of metal or other suitable material. It may be snug-fitting and cushioned with facilities for attaching an oxygen mask and/or audio equipment, or it may be designed for wear over a liner to protect the head from flying projectiles. Excludes helmet, ground troops' and helmet, ground troops'-parachutists'.