When sourcing natural sheepskin, quality is determined by several physical attributes. First, check the wool density and height; premium skins usually have a density that prevents the leather backing from being visible when parted. Second, assess the tanning process—high-quality skins should be chrome-free or meet eco-tanning standards to ensure they are odorless and skin-friendly. Third, inspect the leather side (suede) for suppleness and lack of scarring or holes. For B2B buyers, it is essential to request Grade A skins if the application is for high-end home decor or medical-grade rugs.