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With its compact padding, the backrest of the HAL Ply Tube Stackable office chair conveys a sense of classic elegance and quality craftsmanship. The sandwich construction with integrated lumbar support provides the comfort of an upholstered backrest while being almost as slim as a mesh backrest – offering an alternative to both of these construction types for office chair backrests. Final assembly of Vitra Hal Ply Tube stackable seating occurs in an ISO 9001 and ISO 14001 certified facility.