High-Quality Material These coasters are made from wood MDF, which enables them to absorb water in a few seconds and is splinter-resistant. Anti-Skid The texture of the material keeps the coasters from slipping and moving, which protects your furniture. Safe & Tested These coasters have been tested for colour fastness to rubbing (for both wet and dry conditions) and to water for colour change and stain. Easy Clean These coasters are lightweight and easy to clean with just a damp cloth, no abrasive cleaners are needed.