A Gentex Alpha 900 flying helmet. Made from an epoxy resin aramid and a carbon fibre one piece shell, the helmet is lightweight whilst providing impact and penetration resistance, covering the top, sides (including the temple area and to below the ears), and the rear of the head. It has been designed for both fixed and rotary wing aircraft (fixed-wing aircraft include those that are propeller driven or jet engine powered and have wings that do not move; rotary-wing aircraft are those that are powered by rotating blades, such as helicopters) and is intended for both civilian and military use. The helmet system is modular so that it can be built/adapted to include the user's specific requirements for communications, respiratory, hearing, eye and face protection with replaceable and serviceable parts that contribute to reduced costs and improved deployment time. Available in a variety of sizes and colours (this example is medium and gloss yellow), it has a quick-fit system, incorporating a ratchet nape adjustment to ensure helmet stability is maintained throughout the flight. Includes a dual visor plus visor cover, a MBU20 oxygen mask for high altitude flying and Communication Ear Piece (CEP), small transducers which fit inside the ear canal to assist with noise cancelling.