Helmets protect the head, ears and brain. It fully covers the head and ears and snaps around the neck area. By protecting your head it also protects your brain.
Because the brain is IMPORTANT. We do not want it to be damaged (this is why we wear helmets if we plan to do something where the head could be injured).
the helmets protect them a lot
Helmets?
Storm Troopers wear armor to protect them from blaster bolts. The helmets protect their heads.
to protect their faces
Helmets.
Skull bones protect your brain.
To protect the head in case of impact.
skin
Obviously, they wear helmets to protect their heads from injury. Batting helmets are used to protect the batter from being injured by a pitched ball and although its rather rare from a foul ball off his own bat. Batting helmets are required in most leagues While playing in the field or running bases, some players wear helmets or inserts in their caps, to protect their heads from injury. There is surely the possibility of being hit by a throw ball, or being kicked in the head or hitting ones head on the ground or against an opposing player's body when sliding into base.
Same reason as helmets have always been, and are used - to protect their heads against impact.
They wore helmets in order to protect their head from the weapons of their enemies during the battle.