Knox MICRO-LOCK Limb and Back Protectors - SMART – SOFT - STABLE. New MICRO-LOCK back and limb protectors are the softest, most comfortable protectors Knox has ever made and they totally contour to the body. Knox MICRO-LOCK uses SMART technology and properties to keep the armour super soft to touch but it locks when impacted. The locking action increases the amount of impact absorbed by the protector and reduces the energy passed through to you. All parts are certified with both Level 1 and Level 2 options for both limbs and back. Knox Micro-Lock 56 Length: 23.5 cm Width: 15.0 cm Sicherheit: EN 1621-1:2012, Level 1