Selected fabric: High-quality PVC fabric. comfortable and breathable. durable. Breathable and comfortable in summer. it is not easy to sweat. and it is not easy to harden in winter. Porous design: Adopt high-temperature thermal compression and multiple vent design to disperse the seat body pressure and accelerate air dredging. Good air-tightness: The transparent PVC air-filling hole and the air-filling bag adopt heat-sealing technology. After many pressure tests. the air-tightness is strong Easy to inflate:Equipped with special pump.Easy to use.Fine seaming does not skip stitches. and the feet are fine and not easy to leak. It is recommended to inflate 80%. the surface creases will disappear. and lightly pressing with hands will have obviousresilience. Usage Scenario:Wheelchair ; Office chair ; Car ; Travel ; Stadium.