"Kiln-dried, double-lacquered pocket-size hardwood brush block filled with a 70:30 blend of smooth black, fine diameter polypropylene fiber and soft, premium horsehair.
Dual-effectiveness: medium stiff but fine polypropylene stimulates hair follicles while the softer horsehair leaves a healthy, glossy coat. Pocket-size block provides more manuveurability around sensitive areas including the head, neck and legs."