What is Bulletproof vest?

Bulletproof vest is a kind of clothing used to protect the human body from damage caused by bullets. They are made up of vests and soft armor plates(bulletproof panels). The material of the vest is polyester, oxford or nylon. The material of the bulletproof plate is UHMW-PE or Kevlar (aramid).
Body armor can protect against pistol bullets, but to protect against rifle bullets or higher energy bullets, we need to put  hard armor plates on the vest,like ceramic or steel bulletproof plates