Absorbs moisture: Luxurious coasters are designed with a cork backing to help absorb moisture and will protect against marks and rings on your coffee table, end table and dining room table. A perfect addition to any man cave or luxurious lounge. Non slip: Each coaster has a cork bottom to protect surfaces and to prevent sliding. Set of 2 coasters: This set of 2 coasters will protect surfaces from both heat and moisture and can be used in multiple rooms of your home or office. Measurements: Each coaster measures about 4 inch diameter. Reusable: These coasters are eco friendly and reusable unlike paper or cardboard coasters; Clean as needed with a damp cloth and towel dry for best results. You oil or stain your coasters for an even more luxurious rich look.