Our wool filled organic cotton mattress pads are 1/2" of compressed natural wool from organically raised sheep. Processed in our own facility to keep out contaminants. The only organic wool that does not process on machinery that processes other items. Circle quilted for a nice feel and attractive look. Because it has a natural wool filling it also works as a bacteria and mildew resistant in addition to flame retardant. Wool wicks moisture away from your body so this is a good choice for those that may sweat at night yet want a softer pad. Spot Clean only.