The Delta Office Chair is the high back chair with a headrest. The Ergonomic design supports your upper & lower back, shoulders, and neck, and is designed to deliver comfort for all-day use. It has several ergonomic features that improve your posture, protect your health, and increase your productivity: Delta Office chair has a Single lever that provides a single locking system of the backrest. Its high-grade nylon mesh on the backrest gets adjusts to your proportions and needs. You can raise the seat height and recline the back with a single lever, and it has height-adjustable armrests and vertically adjustable lumbar support. 1.Lumbar Support: The adjustable Lumbar Support prevents back pain by providing support. The perfect back support is provided by the high backrest in nylon mesh which allows the circulation of air and avoids heating. 2.Adjustable Armrests: Adjustable armrests change the height to provide maximum support for your arms and allow your wrists to relax while working and avoids the strain in your wrists, shoulders, and neck. 3.Seat: The PU foam seat is upholstered with high-grade nylon knitted fabric, providing a soft seat and allowing the air to circulate. 4.Headrest. This adjustable headrest designed ergonomically which allows you to increase and decrease the height and it can also be twisted at different angles to suit your choice. Itâ€™s made with a soft cushion and knitted 5.Base. This ergonomic office chair has a five-point chrome base and nylon casters. it has a load-bearing capacity and allows you to maneuver easily around the room without straining, turning, or twisting your body to reach items on your desk or talk to co-workers.