daff DAF4108 Set of 4 Coasters Round - Beige Mel daff felt is a 100 % natural product and made of pure Merino wool Why Merino? Only pure Merino wool can guarantee brilliant colors Available in 10cm square or round in 24 vivid hues Cleaning is easily achieved with a sponge and a dab of wool detergent After hand cleaning dry flatly. If needed, you can iron with a little steam.