Bullet Resistant Shirt

I recently bought the Bullet Resistant Shirt and when I joined ingame I didn't know if the Vest is visible or invisible and the Description of the game pass says "GUNS ARE OP LOWERS BULLET DAMAGE BY 33%"

Somebody please tell me if it's invisible or I am doing something wrong to wear it. Let me know if buying it for 500 Robux was worth it or not! Thank you.