Kevlar helmet and aramid helmet on which is better

Kevlar helmet and aramid helmet, who is good?

Aramid is aramid fiber, And aramid fibers are divided into two kinds, Kevlar is the so-called United States du Pont company trade name of para-aramid fiber, Kevlar helmet is a helmet made of aramid fiber material.

Factors such as cost, weight, Kevlar is indeed the best selection to mass manufacturing personal protection system.