Our unique moisture pads are 100% Wool. Pure and certified organic wool from United States is felted here in the United States to create a perfect pad to resist liquids. Softer than competitor wool pads so you don't get that itchy feeling. No treatments, no plasticizers. Natural Elastic straps to put on any mattress. You can cool, delicate machine wash ours as we oversize them to allow for the shrinkage. Hang dry indoors. Dries fast. Urine does not grow bacteria on these, so only wash if soiled.