 A frock-overcoat, like a frock coat, almost never has pockets.Both the top-frock and over-frock coats were woollen, like most male garments of the time, and were made in varying weights, ranging from just 14oz for mild-weather topcoats, to 20 or 30oz for really cold weather.Wool was not a prerequisite, but was the most common material, and came in a range of qualities, the finest being that of a Merino sheep.