[Ergonomic Office chair]：Designed with a scientifically designed dual backrest, adjustable headrest, and thickened seat cushion, the office chair provides comprehensive comfort support for you. Multi-adjustable design allows you to customize the seating experience to your body shape and posture, eliminating the discomfort of long hours of desk work. [Dual Backrest Design]：Perhaps what you need when you're working isn't an extra back cushion, but a dual-backrest office chair. Wide curved 2D lumbar support adapts to waist natural curve, 3cm front/back adjustment providing precise support to keep your lower back relaxed. [Custom Headrest]：The headrest can be adjusted rotated 50°, allowing you no longer to worry about the headrest only being able to be adjusted up and down. Whether you need to sit upright to work or lie down to rest, it provides the best support angle for your head and neck. [Adaptable Space-saving]：Features convenient 90°flip-up padded armrests that tuck neatly under your desk, freeing up space. The padded design also relaxes your elbows when you lean back to rest. Flipping the armrests provides you with more freedom to move around. [Comfortable All Day]：Enjoy lasting comfort with a 9cm thickened and 51cm widened seat cushion and a breathable mesh back that promotes airflow, keeping you cool and focused throughout your workday or gaming marathon. [Quick Set-up & Reliable service ]：Start enjoying your new chair in 15 minutes. All necessary tools and clear instructions are included, designed for a simple one-person installation. Backed by a reliable after-sales service team, your satisfaction is our priority. Notes：1.This chair cannot be locked when inclined; 2.when you want to use the rocking mode,first please pull out the lever to active the rocking mode,lean your back,then you can recline the chair; 3.if you want to lock the chair when you at upright position,please twist the knob to the most tight; 4.this chair has adjustable Lumbar Support,please adjust the Lumbar Support to find the best back support for you.