Our organic wool puddle pads use our ecowool which is carded and certified organic during this processing by Oregon Tilth. It is then felted at a west coast felting mill. This pad naturally resists liquids to protect your mattress. No polyurethane or other synthetic backing is put on our wool. USA wool is not quite as soft as our Merino Wool Moisture pads but the price is a bit better. Adult sizes have elastic straps and all are machine wash since we oversize ours to allow for the shrinkage; HANG DRY not in direct sunlight.