Design
The M1 is two "one-size-fits-all" helmets — an outer metal shell, sometimes called the "steel pot", and a hard hat-type liner that is nestled inside the shell and contains the suspension system that would be adjusted to fit the wearer's head. Helmet covers and netting would be applied by covering the steel shell with the extra material tucked inside the shell and secured by inserting the liner.
The outer shell cannot be worn by itself. The liner can be worn by itself providing protection similar to a hard hat, and was often worn in such fashion by military policemen, Assistant Drill Instructors (known as AI's), and rifle/machine gun/pistol range staff, although they were supposed to wear steel at the range. The liner is sometimes worn in U.S. military ceremonies and parades, painted white or chromed. The depth of the helmet is 7 inches, the width is 9.5 inches and length is 11 inches. The weight of a World War II era M1 is approximately 2.85 pounds, including the liner and chinstrap.
Read more about this topic: M1 Helmet
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