If safety is your priority number 1: Twaron is 5 times stronger than steel, decomposes at about 500°C without melting and has exceptional resistance to abrasion. Ballistic Twaron is stronger than Kevlar and is used in bullet proof vests a.o.
Main Fabric high weight 12,5 oz. stretch cotton denim.
100% TWARON ballistic fabric inner reinforced and mesh-lined.
Knees approved protectors EN1621-1, adjustable and removable from outside.