When evaluating sofa sets, prioritize kiln-dried solid wood frames (such as larch or oak) to prevent warping and ensure a lifespan of 10+ years. For cushioning, specify High-Resilience (HR) foam with a density of at least 35kg/m³ to prevent sagging. If sourcing leather sofas, ensure the use of Top Grain Leather or high-quality Microfiber leather for commercial durability. For fabric options, look for a Martindale rub count of 20,000+ for residential use and 40,000+ for high-traffic commercial environments.