DOD was using the sponge, which was packaged in a thin, flat package, for individual first aid kits. I have been issued Celox and a different brand (maybe same company but different packaging). You have to be sure that you remove as much blood and liquid from the site before you place it or it will form a nice barrier over the wound without stopping the bleeding. Just a quick swipe with one hand to wipe off the blood and quickly place the sponge over the wound, preferably right against the bleeder. It is not a magic fix, but I have seen it stop arterial bleeding before.