IGR - Institute for Health and Ergonomics - has certified the CrazyChair ONE hanging chair.

IGR - Institut für Gesundheit und Ergonomie - hat den CrazyChair ONE Hängesessel zertifiziert.
After careful testing, the CrazyChair ONE was licensed with the IGR certificate. It was awarded by the "Institute for Health and Ergonomics e. V." This is a strong network of doctors, physiotherapists, scientists, employees in occupational health management, officials and product developers who deal with health and ergonomics.

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