First, you must understand the principles of the helmet it before, but it has major components in four parts on
the first part of Shell (Shell) must be rigid and absorb shock well
, the second part is a part. The helmet must be made from EPS (Styrofoam) to prevent shock caused to light up
the third part is to make sure the chin strap is available as well. The chin strap is tight and
the fourth is a nice hat to wear tight-head fit and comfort. Good ventilation is not damp.
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