Despite what many people say (even some boxing sites), no, boxing headgear does not prevent concussions. While boxing headgear does a great job of stopping you from getting your face cut or bruised, it does not give you any proper protection against concussion. The main reason for this is that a concussion is caused by your soft brain hitting the side of your skull when you take a blow to the head. The soft padding of the headgear is on the outside of your head, and not the inside, so it doesn’t make any difference in impact to your brain.  The headgear also tends to make fighters over-confident, which can result in giving and receiving much harder punches to the head. For this reason, the International Boxing Association (AIBA), have found that referees have had to stop less fights due to concussion since they banned headgear from competition. Despite this, the value of wearing headgear during training is still very much worth it to protect your face from injury.