Just about any $30 tact vest will work fine in an Airsoft skirmish when it comes to deflecting BBs. Airsoft BBs just don't have any weight behind their velocity to deliver a sting through a vest. At 200FPS, you won't feel anything on your body behind your gear. At 500FPS, you might feel a slight tap, but when I used to go to skirmishes three or four years ago, I never felt a hit behind my loadout.
Now, if you get hit on bare-skin from a moderate range (or clothed-skin, for that matter), it's going to sting, and it may leave a welt, but still; there's no permanant damage to be done.
The main things to protect in a skirmish are your eyes and your teeth--the two things that will not heal if they take a hit. And if you want to avoid a bad day, it would probably be best to cover your entire face with a mask. I never used full face mask when I used to play, and I've been hit in the cheeks, the lips, the chin, etc; and it doesn't feel too good. But, thankfully, I still have both of my eyes, and all of my teeth
Check here if you need encouragement to use the proper safety gear.
Kravenwolf
