These Merino Wool Felt Coasters provide complete protection for surfaces and are resistant to odor, stain, heat, and dirt. Bierfilzl ("Beer Felt") are traditional high quality German Coasters made from Merino Wool, the most hydrophilic and absorbent of all natural fibers. Sustainable, biodegradable, and renewable, the clean execution of the coaster offer a refined modern heritage element to any home decor. Coasters come in pack of 4 and are available in classic round or square shape.