KNOX Advance X65 back protectors, the lightest CE approved back protectors on the market and it is compatible with all lady Nordcap jackets. Made in Britain by Knox, weighing an incredible 130g so adds virtually no weight to a jacket. Knox Advance X65 Back Protectors are made from a 3 layer construction with a unique lightweight polypropylene honeycomb core. The protector is engineered to form a very strong, flexible and comfortable protector. CE approved to EN1621-2 -2003 Level 1 back protector.