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2. Motorcycle helmet - Wikipedia

   en.wikipedia.org/wiki/Motorcycle_helmet

   A 2008 systematic study showed that helmets reduce the risk of head injury by around 69% and the risk of death by around 42%. [10]Although it was once speculated that wearing a motorcycle helmet increased neck and spinal injuries in a crash, recent evidence has shown the opposite to be the case: helmets protect against cervical spine injury.

3. Visor - Wikipedia

   en.wikipedia.org/wiki/Visor

   Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask. The part of a helmet in a suit of armor that protects the eyes. A type of headgear consisting only of a visor and a band as a way to fasten it around the head. Any such vertical surface on any hat ...

4. Riot protection helmet - Wikipedia

   en.wikipedia.org/wiki/Riot_protection_helmet

   The simplest form is a hard shell with reinforced padding, and a chinstrap and a hinge-up (usually polycarbonate) visor, as in this image. These riot protection helmet visors are usually curved sideways and straight up-and-down, not curved both ways like on the older type of motorcycle helmet. One accessory is a back-of-the-neck protector.

5. Altyn (helmet) - Wikipedia

   en.wikipedia.org/wiki/Altyn_(helmet)

   Altyn (Russian: Алтын; named after ''Altyn'') is a titanium helmet developed in the Soviet Union and adopted by the KGB. Providing great protection to the wearer and equipped with an armored visor, it became popular with Russian Internal affairs and security services Spetsnaz units. These helmets are made by NII Stali. [1]

6. Visor (armor) - Wikipedia

   en.wikipedia.org/wiki/Visor_(armor)

   The first recorded European reference to a helmet's visor in the Middle Ages is found in the 1298 will of Odo de Roussillon, which speaks of a heume a vissere. [4] Whether this statement refers to a pivoting visor or a fixed faceplate is not clear; but by the early fourteenth century artistic depictions of moving visors appear quite frequently. [4]

7. Personal protective equipment - Wikipedia

   en.wikipedia.org/wiki/Personal_protective_equipment

   Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, electrical, heat, chemical, biohazards, and airborne particulate matter.