Bullet proof Kevlar or Twaron aramid fabric NIJ level IIIA ballistic resistance H.P white laboratory tested Yellow color Bullet Proof Aramid Unidirectional (UD) SHEETa Lightweight & High Performance Bullet Proof Material.The High Performance Bullet Proof Material - Unidirectional Sheet (or call UD) is made from several layers of the Aramid fiber (Twaron or Kevlar aramid fiber). All the fibers ...