What foam specs should I look for in lounge seating built for commercial use?

Commercial lounge seats should use foam with at least 1.8 lb/cu ft density and an ILD (firmness rating) in the 35–45 range — firm enough to hold its shape through years of daily use without bottoming out. Higher-end pieces run 2.0–2.5 lb/cu ft. Residential-grade foam at 1.2–1.5 lb/cu ft tends to break down within a year or two of heavy use, leaving you with saggy seats. Every lounge piece at FindOfficeFurniture.com is spec'd for commercial use — call 888-719-4960 to confirm foam ratings on a specific model.