Key Features - Flip-up Armrests for Space-saving Storage - Designed with 90° folding armrests, this ergonomic office chair offers comfortable support while also allowing you to flip them up to slide the chair under your desk, saving valuable space. Ergonomic Chair with Lumbar Support - The human-oriented ergonomic backrest fits the curve of your back and waist, helping to relieve fatigue from long sitting sessions. A wide lumbar support is included to effectively reduce lower back pain. Height Adjustment and Rocking Function - The seat height is adjustable from 18" to 22", making it suitable for desks of various heights. The backrest also rocks between 90° and 120°, allowing for a relaxed sitting experience. Breathable Mesh and Comfortable Seat - The high-elasticity, abrasion-resistant mesh backrest ensures breathability and comfort. The thick, sponge-padded seat cushion offers high resilience and a pleasant sitting experience. Stable Structure and Flexible Movement - Constructed with