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In many countries the wearing of motorcycle helmets is mandatory. Helmets are made in two main layers: hard and energy-absorbing. The hard shell spreads an impact over a larger area, while deformation of the liner (often polystyrene foam) absorbs energy so less is transferred to the skull and brain. [14]
A collection of motorcycle helmets worn by Moto GP racer Valentino Rossi. A motorcycle helmet is a type of helmet used by motorcycle riders. Motorcycle helmets contribute to motorcycle safety by protecting the rider's head in the event of an impact. They reduce the risk of head injury by 69% and the risk of death by 42%.
Industrial inspector wearing a thermoplastic hard hat in Cologne, Germany. A hard hat is a type of helmet predominantly used in hazardous environments such as industrial or construction sites to protect the head from injury due to falling objects (such as tools and debris), impact with other objects, and electric shock, as well as from rain.
The face mask hangs from the head piece by a central hinge, and would be fastened with straps connecting a loop under each ear with corresponding holes in the neck guard. [1] [2] [3] The entire helmet, the iron core of which is between 1 and 6 millimetres thick, [4] weighs 2.217 kg (4.89 lb), of which the face mask comprises 982 g (2.16 lb). [2 ...
Within each category, different techniques are employed to reduce or eliminate noxious airborne contents. The term respirator in the hospital setting refers to the N95 filtering face piece masks that are commonly used to care for patients with Tuberculosis. There was much controversy over the use of these masks during the H1N1 outbreak of 2009. [9]
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