Examine the Martindale rub count; for high-traffic commercial areas, a rating of 30,000+ rubs is essential, while 15,000-20,000 suffices for home use. For leather chairs, Top Grain or Full Grain leather offers superior breathability and patina compared to 'Bonded' or 'PU' leather. Check the foam density; high-resiliency (HR) foam with a density of 35-45kg/m³ ensures the seat retains its shape over time. Inspect the stitching precision, looking for a consistent stitch length (approx. 3mm) and the absence of loose threads or puckering at the seams.