Price: ¥770 (tax included) x 2 A set of 4 coasters made from lava stone, offering excellent usability. Lava Stone is a rock with a highly porous structure formed when magma cools rapidly near the surface. With its excellent absorbency, it quickly absorbs water droplets that form on the surface when you put a cold drink in a glass, thanks to the superior absorbency of volcanic rock. The back is made of natural rubber, making it non-slip, and the various colors and patterns allow you to use them in various scenes. Size (approx.): Diameter 9 x Thickness 0.4cm Weight (approx.): 15g Material: Polyurethane, non-woven fabric, lava stone (volcanic rock), natural rubber