Cardinal Sandstone Coasters - Absorbent & Stylish | 4-PackEbern Designs coasters are the leader in drink coaster innovation. The naturally absorbent sandstone material, combined with the cork backing, will add an additional layer of protection your furnishings, and provide a stylish accent piece to your home or business. Ebern Designs coasters are a long lasting and environmentally friendly product. Sold as a set of 4, these 4 inch coasters are very stylish, useful, and affordable. Sit back, relax, and enjoy