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.
the helmets protect them a lot
Helmets?
Storm Troopers wear armor to protect them from blaster bolts. The helmets protect their heads.
The top of the head is the most vulnerable part of the body in terms of potential injury, as it houses the brain and is not protected by bone like other areas. It is important to wear helmets or headgear to protect the head from trauma.
to protect their faces
Helmets.
Skull bones protect your brain.
skin
To protect the head in case of impact.
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.
They wore helmets in order to protect their head from the weapons of their enemies during the battle.
Same reason as helmets have always been, and are used - to protect their heads against impact.