A Paratrooper helmet is a type of Combat helmet exclusive to paratroopers and airborne forces. The main difference from combat helmets is that Paratrooper helmets have a different harness and lining to withstand impact when jumping from aircraft and keep the helmet stable in flight, and most have a lower-profile shell to reduce wind resistance. Most modern combat helmets have features making them suitable for airborne use.
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Paratrooper helmet Wikipedia(Text) CC BY-SA