Product Features Three adjustable back sections and 14 adjustable head sections, designed according to ergonomics. Built-in spring seat bag for a full seating feel. Folded packaging for compact shipping and storage. Bottom 360-degree rotatable design for flexible movement. Descriptions 3D Decompression Engineering Chair: Three-dimensional tailoring for comfort and high elasticity. Ergonomic bump cushion reduces thigh pressure for prolonged sitting. 3D memory elastic sponge provides moderate softness and firmness, relieving leg pressure when sitting upright. Engineering adjustment supports children's backs comfortably, with multi-dimensional adjustment suitable for ages 3 to 18. Pressure-relief armrest design promotes healthy posture and learning habits. Compatible with most desks, featuring adjustable height and ergonomic support for long-term use.