... -Tech Materials:1)Soft stabproof vests: made of short Aramid fibre, cover is made of nylon 600D , weight 1.3kg( with the ... ) 2).Semi-soft stabproof vests: made of alloy steel and high fibre, cover is made of nylon 600D , weight 2.8kg( with ... specific requirment.Characteristics:1. Perfect ballistic performance, qualified with all levels of USA NIJ standard 0101.04 .2. Upgrading protection level to ...