The O-Wool™ mark represents the highest standard available for certified organic wool products. O-Wool™ sets the industry standard by distinguishing itself from other products made with wool and organic wool.O-Wool™ yarns and fabrics are made only using wool certified by US Department of Agriculture-accredited organic certification agencies. In addition, the products are processed using the most sustainable methods commercially available.(sheep have dark and light coats so you may see some dark fibers) Exclusively Pure-RestOur plush organic mattress pads are so soft and comfortable. Made from the cleanest organic merino wool for super softness. Adding plushness to your mattress without adding chemicals. Water resistant to keep sweat off your mattress and regulate body temperature. Spot clean only. Custom Sizes available.