These cleanroom chairs have been tested to Fed Std.209E and ISO 14644-1 requirements (Class 10 or ISO Class 4). Ergonomic benefits include an adjustable backrest with lumbar support for increased comfort during extended sitting durations, a contoured waterfall design, over 65 antimicrobial or antibacterial standards, custom vinyl color configurations, and molded polyurethane cushioning. The 5-leg polished cast aluminum base prevents tipping and is designed specifically for use in cleanroom environments. These bases can be fitted with non-marring chrome hooded casters or non-marring ball glides.