This chair features comfortable, skin-friendly, and breathable fabric. It is filled with high-density sponge for a medium-firm seating experience that fully supports and relieves body fatigue and pressure. The high-density rebound sponge is durable and resistant to collapse, ensuring long-lasting use. Ergonomically designed to fit closely to the waist, it protects the natural curvature of the spine and effectively relieves spinal pressure and lumbar fatigue.