The Gambeson Lined Shirt Coat takes its name from the mediaeval long quilted garment worn underneath, or instead of, metal armour. Each panel is fully lined with cotton casement and quilted in a single V stitch line from one corner to the other.

The shirt is cut from the same pattern as the Type 452 Bridge Pocket Shirt, but laid across the piece instead of up and down. As the warp yarn shrinks more than the weft, the Gambeson Lined Shirt is pulled in sideways for a slimmer, longer fit.

This style can be worn as an overshirt or layered as a coat or jacket.