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Manufacturer's Product Description

With the Sum work chair, all you have to do is sit. It provides continual support for every person and every task without levers, knobs, or training. It offers ideal ergonomic positioning by adapting itself to your height, size, and working position. The secret is Sum's proprietary technologies that provide completely customized support for the perfect sit. Complete with work chairs and work stools with or without arms, Sum fits in all parts of the office and are designed to fit the office population from the 5th percentile female to the 95th percentile male, for the ultimate in flexibility.
Sum work chairs are available in high-back or mid-back styles. Designed by Marcus Koepke.