As my regular readers know, I typically stick to using cotton yarn for a large portion of my projects. But for this project, I opted for an acrylic blend, simply because they don’t absorb as much liquid as cotton does, so if you’re using your coaster for a cold drink, the condensation from it isn’t going to drench your coaster and leave marks on your table. (Which is the point of a coaster in the first place, right?) They also don’t get as hot as cotton does, so if you’ve got your hot coffee or tea sitting on it, it isn’t going to create any heat on your table either.