Woven wool wads, center-lubed with Bore Butter. 1/8" thick, with "memory" which allows them to be used in full choke barrels. Once seated, they will expand again to the diameter of the bore. Exceptionally tough and will not blow apart like some conventional felt wads.
They do triple duty:
Over the powder wad
Over the shot wad.
Now you don't have to worry about undersized cushion wads.