When sourcing high-end Wool Mohair Fabric, you must prioritize the composition ratio, typically a blend of Angora goat fiber and sheep's wool. Look for a Mohair content of at least 30% to ensure the characteristic luster and resilience. Pay close attention to the fabric weight (GSM); coating fabrics usually range from 400g to 650g, while suiting is lighter. Additionally, verify the yarn count (e.g., 1/15Nm or 2/26Nm) as higher counts indicate a finer, smoother finish. Ensure the supplier provides colorfastness ratings of Grade 4 or higher to prevent fading in luxury garments.