Medical Sheeps Wool OverlayThe presence of inflammation is usually accompanied by a short timeframe of 24 36 hours for the development of skin breakdown. Within 12 hours, positioning medical sheep's wool beneath the body, particularly the coccyx, typically improves the affected area by 180 degrees. The highest quality 100% pure Sheep's Wool Fabric comes in four wool pile densities: two non health densities of 550 grams and 700 grams and two health densities of 850 grams and 950