Strata 24 Hour Black Mesh Back Posture Office Chair. Fabric upholstered headrest that supports the weight of your neck and shoulder. High mesh back with integral lumbar support, ensuring full back support in an environment where it is most needed. Height adjustable arms included as standard, encouraging the user to sit in the correct seating position. Cold moulded, extra thick, foam seat provides ultimate comfort for all-day support. Robust and strong 24 hour mechanism, with no less than 5 seat and back options, ensuring a durable and structurally stable chair.