Blue Whale high back ergonomic office chair, can more effectively support the back compared with low back office chairs and leather office chairs,The back of the chair is ergonomically designed to provide you with comfortable back and lumbar support during daily work, helping to relieve spine strain and fatigue and helping improve your sitting posture. It is made of a high-resilience sponge and meshes fabric to ensure comfort and breathability. With a 360-degree rotation function and height adjustment function, this chair is very suitable for study rooms, living rooms, etc.Blue Whale Ergonomic office chairs can give you a unique sitting experience!