Wool is the most hydrophilic of all natural fibers, absorbing as much as 30% of its weight without feeling wet. Our traditional Bierfilzl ("Beer Felt") are the highest quality German Merino wool felt coasters on the market today. Their clean and minimal execution offers an unexpected textural and refined modern heritage element to any home decor. Set includes 4 hand-cut heavy duty 5mm thick Merino wool felt coasters to provide extra surface protection.