When sourcing designer fashion, the fabric composition is the primary indicator of value. Prioritize natural fibers like Mulberry silk, Egyptian cotton, or Grade A cashmere. For synthetic blends, ensure they are high-performance or eco-friendly recycled fibers with a GSM (Grams per Square Meter) appropriate for the season. Regarding craftsmanship, inspect the stitch density (at least 10-12 stitches per inch), the alignment of patterns at the seams, and the use of premium hardware such as YKK zippers or branded buttons. Requesting a pre-production sample (PPS) is essential to verify that the drape and fit meet your brand's specific silhouettes.