This upgrade will only work on Halcyon backplates.  This upgrade will not work with other manufacturers backplates due to the shape being different.

Your Halcyon deluxe padding is specially designed to allow exceptional comfort without sacrificing any of the features you have come to expect from Halcyon. Shoulder mounted D-rings can easily be moved to the desired location without affecting the Halcyon shoulder pad. Meanwhile, a specially designed backplate pad provides exceptional comfort without sacrificing adjustability or the utility of the Halcyon storage pocket. 

Choose size for what plate you have meaning standard plate or small plate