Bought this with the topendz group buy and it's a bit too bulky for my liking with the added thickness of the back protector. I'm selling it for what I paid for it, which is still a good deal. Never worn extensively, just tried on for a few minutes.
You can add it to any back protector or just snug it under your leathers for added protection.
From Knox's website:
A separate CE approved chest that can be fitted to any Knox back protector.
Body moulded to give maximum coverage and is ultra lightweight and comfortable. A smart fixing system means that the chest can be adjusted for a secure comfortable fit.
Thanks Bryan, hope you enjoy it.