About this item Breathable Mid-Back Design: Featuring densely knitted mesh backrest, this mesh office chair allows better airflow, accelerating heat and moisture dissipation. Mid-back design supports your spine's natural curve and protects your lower and middle back as it prompts you to sit straight User-friendly Armrests: The ergonomic armrests provide you with all-time support for your arms and enable you to sit more cozily, getting rid of your fatigue after a long days hard work Adjustable Seat Height: The seat height of this computer mesh chair can be simply adjusted from 46cm/18 to 56cm/22 by a little push-up/press down at the lever under the seat according to your needs Robust Chair Construction: This mid-back office chair is constructed of hard-wearing polyester mesh, nylon star base, solid rolling casters and steel gas cylinder. It has passed BIFMA X5.1 Test and is recommended for office use for customers under 300 lbs Reclining Office Chair: By simply pushing the lever or pull