You're looking at 100ml (3.4 fluid ounces) of Seiwa Leather softener. This agent is excellent as a treatment prior to carving your leather.
Don't risk your swivel knife blade catching on your leather, spoiling your carvings, or aching fingers from the fatigue of carving hard leather. Get this softener today!
Simply dilute in water (1 part treatment for 4 parts warm water), mix the solution and brush onto the grain side of the leather that will be carved and allow to absorb.