★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 obvious resilience. ★Usage Scenario★:Wheelchair ; Office chair ; Car ; Travel ; Stadium.