Mecor High Back Office Chair Ergonomic Mesh Swivel Computer Desk Chair with Lumbar Support,Black Ergonomic Office Chair--This office chair designed with human-oriented ergonomic construction for providing comfort sitting experience.And the fixed arms provides all-day support for the arms, shoulders and upper body to relax arm muscles. Adjustable Height & 360 Degree Swivel--This office chair adjusts the height of the chair seat according to the height of the seater,(maximum height:20.08" mininum height:16.14")so that you can maintain your natural relaxation whether you are at work or at rest.Moreover, this office chair had multiple rotation test,so no matter which direction you want to go, you can easily reach it by simply twisting your waist. Soft & Breathable Seat Cushion--The seat cushion of this desk chair has been updated to provide more advantages. For example, the breathability is better than ordinary office chairs, and it won't feel hot when sitting in the summer; And it is more flexible and soft, so that you will feel comfortable even if you work for one day;In addition,this seat cushion is not only easy to deform but also antibacterial,let you use it for a long time and safely! Mute Nylon Castors--This high back swivel office chair features five-star nylon castors,these casters have good shock absorption,flexible rotation and no noise,no damage to the floor,very durable and solid!And when sit on this office chair, you can move it easily and smoothly on the floor. Suitable for Different Places--With the stylish and simple design, this modern and classic black office chair fits for use in any office setting and home setting.