There are only two care products offered by Gaziano & Girling, both are shoetrees.
I think this nature may mean color, which means the original colour of wood. There are few official introductions, one is which last types are suitable for, and the other is Bench made.
There are only a few suitable last types in the introduction. This black one is really hard to see in the picture. It may be satin.
Summary
As I said before, as a shoe brand, if you want to sell care products and really participate in the competition in the open market, then the real competitiveness is in the shoetree, because you have a shoe last to correspond with and compare. And GG has done a very good job at this point.