When evaluating new design fabrics, you must prioritize material composition (e.g., natural fibers like cotton/silk vs. synthetic blends like recycled polyester), fabric weight (measured in GSM - grams per square meter), and weave structure. For high-end designs, ensure the thread count and yarn fineness meet your quality benchmarks. Additionally, verify colorfastness to light and washing (Grade 4 or above is recommended) and shrinkage rates (ideally <3%) to ensure the final garment or product maintains its integrity.