English 
Usually, the shell of the helmet is made of high-strength materials, such as metal, engineering plastics, Kevlar fiber, etc., through its deformation to absorb most of the impact; the lining material has the ability to absorb sweat, keep warm, and absorb shock. Military helmets often have the functi
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A skate helmet and a bike helmet are not the same—and using the wrong one could leave you underprotected. Skate helmets are built for multiple low-impact hits, while bike helmets are engineered to absorb a single high-impact collision. Choosing the right helmet depends on your sport, the type of fal
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Finding the right bicycle helmet fit is straightforward: measure your head circumference, match it to the manufacturer's size chart, then adjust the retention system and straps until the helmet sits level and doesn't shift. The right fit depends not only on head size, but also on your riding style—r
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