SIHOO Ergonomic Office Chair, Mesh Computer Desk Chair with Adjustable Lumbar Support, High Back chair for big and tall, Black

M18, SIHOO's high back ergonomic office chair, can more effectively support the back and head compared with low back office chairs and leather office chairs, while providing larger sitting area. The seat cushion is made of soft sponge to keep your hips comfortable. The backrest is made of high-stretch breathable mesh to avoid stuffiness. High quality is gauranteed with numerous tests. Furthermore, we promise 24-hour online service, 30-day free returns, 60-day free exchanges, and 1095-day warranty. SIHOO M18 Ergonomic office chairs can give you a unique sitting experience! 【Waterfall Seat Cushion】: High-density sponge,waterfall edge and moderate hardness effectively relax your thighs. 【C-Shaped Backrest】: Highly elastic and breathable mesh works together with lumbar pillow that can be adjusted up and down or front and back to supports your back and waist effectively. 【PP Headrest】: Made of PP material, it can be rotated 45° and has a lifting function to effectively support your head.