ReActiv mesh-back design delivers total zonal comfort with the perfect balance of the right type and right amount of support. Unique, back-cushion-style lumbar support is height adjustable: up and down, to provide personalized support and extra relief where you need it. Synchro-tilt mechanism with seat slider offers a full range of reclining positions. Tilt tension controls the rate and ease of recline. Upright tilt lock secures the chair in the full upright position. Pneumatic seat height adjustment moves the seat up and down to adapt to various body heights. Compact, low-back format is tailored for administrative and technology functions.