PROTECT SURFACES: this set of 4 coasters will protect surfaces from both heat and moisture and can be used in multiple rooms of your home or office | NON-SLIP DESIGN: the outer portion is crafted from beautiful acacia wood and features a small lip to keep your drink secure; Each coaster has felt feet to protect surfaces and to prevent sliding | ABSORBS MOISTURE: Kamenstein coasters are designed with a cork insert to help absorb moisture and will protect against marks and rings on your coffee table, end table and dining room table | LARGE SIZE: each coaster measures about 4 inch diameter with a 3 inch diameter cork insert | ECO-FRIENDLY: these coasters are reusable unlike paper or cardboard coasters; clean as needed with a damp cloth and towel dry for best results