Strata High-Back Task Chair with Seat SlideThe Strata High Back Task Chair with Seat Slide is the ultimate Physio approved office chair. The fabric upholstered headrest supports the neck and shoulders, while the high mesh back with integral lumbar support ensures proper posture. The extra thick foam seat provides maximum comfort, and the height adjustable arms are included as a standard feature. The robust 24 hours mechanism offers no less than 5 seat and back options for maximum movement.