This is the start of a heraldic sideless surcoat. As always, the garment starts with a design and research. This garment combines a (hopefully soon to be) device of mine, with the device of the Barony of Bhakail. Both are animals enflamed.
There are many examples of this type of garment on effigies and in illuminations. It was probably not designed for everyday wear, but for formal occasions for those of the upper class. This garment will be made from linen, as it will be worn in the summer time, and linen breathes better in the heat and humidity.