KNOX MICRO-LOCK COMPACT BACK ARMOUR - LEVEL 2 - PART 500KNOX MICRO LOCK COMPACT BACK ARMOUR LEVEL 2 PART 500 Introducing Knoxs new generation of Micro Lock armour Micro Lock Compact. Knoxs softest and most comfortable way to protect yourself. Designed to contour to your body, this armour remains flexible and comfortable to the touch until impact, when it instantly hardens and absorbs the force of the impact, reducing the energy passed through your body. Part Number 500 60% Thinner, sleeker and lighter