I didn't say it wouldn't leave a bruise. Even solid armor plates won't stop that amount of kinetic energy without leaving a mark. But having soft padding between the projectile and your skin will reduce the abrasion and force of low-angle impacts. "Better than nothing" in this case means the difference between a deep bruise, and a deep bruise under potentially an open and bleeding wound.

[–] Jiggle_Physics 1 points 8 months ago

I am saying that something as weak as a balaclava would not even accomplish this. If you have ever seen people get hit by these wearing hoodies, and the like, you will see they tear right through that shit like it isn't even there. This is like trying to reduce the trauma of a hammer blow with a sheet of paper.