Our unique new printed wool felt coasters are truly functional in that they are made using natural pressed wool felt. They are hygroscopic, hydrophobic, durable and robust making them a great option for a coaster. This one is our double coaster which has great versatility for vases, glasses and bottles on your dining table, cutlery place settings and since they have heat resistant properties, can act as a small trivet. 5mm 100% Merino wool felt. Spot Clean.