Bath brush in birch and horsehair. Bath brush with string, small and handy to keep close at hand in the shower. Horse hair is an excellent material in bath brushes because it is soft and pliable while it is sturdy and durable and has a certain elasticity. Along with a good soap it gives a soft and comfortable lather for a perfect cleaning.  Allow the brush to dry hanging or standing on the horsehair so that the water is transported away from the wood that is more sensitive to moisture.