Reclining Backrest with Rocking: 90 -115 Tilt Cradle-style relief. Freely adjust rocking amplitude via the bottom knob for personalized comfort. Zone Spinal Support System This computer chair s ergonomic backrest with thickened headrest (12.2" 4.72"), shoulder support, adjustable lumbar air cushion, sacral curve, and 7 anti-slip seat.
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