Bierfilzl Round Felt Coasters - Terra $24.00 Default Title - $24.00 Quantity This product is currently sold out. The traditional Bierfilzl. These coasters are made of 5mm German Merino wool felt. Naturally water resistant, stain resistant, heat protective and insulating. Color: Rosewood, Cumin, Heathered White, Tobacco. 4"dia.; 4 pack. Made in USA.