When sourcing polyester suede (often called microsuede), the primary indicator of durability is the Martindale Abrasion Test score; for sofa use, look for a rating of at least 20,000 to 30,000 rubs for residential use and 50,000+ for commercial projects. Additionally, check the fabric weight (GSM), where a range of 250-400 GSM typically indicates a high-density, long-lasting material. Ensure the fabric has undergone colorfastness testing (Grade 4 or higher) to prevent fading under sunlight or during cleaning.