Wool is the most hydrophilic of all natural fibers, absorbing as much as 30% of its weight without feeling wet. A coaster should be 3 things: beautiful, functional and enduring. Representing coasting at its finest, Bierfilzl coasters do all that. It’s science. When felt absorbs moisture from the surface it follows the long, densely felted merino fibers out to the edges where it evaporates. Surfaces remain dry, ring-free and grateful. That’s exactly what a coaster that works should do, over and over again, without sticking to your glass or losing its looks.