Manual pressure inflatable/vent. Use manual press type to inflate, deflate. Adjustable air bag saturation, portable and convenient. Deep groove design fresh and breathable not stuffy cover sweating. The maximum height of the balloon is about 4cm. The air sac gap is moderate, enhance ventilation reduce the hip and leg contact surface. Make riding more comfortable, breathable and stuffy.Waterproof design come rain or shine. Cushion surface flushes. It's easier to clean, rain free. Let you ride in peace. Multiple air convection technology is used. When air sacs are under pressure, gases flow to each other uniform compression "anti-gravity" effect. Can buffer the vertical pressure of the body, can reach more than 80%. Authoritative attestation professional and trustworthy. After the national authority certification quality assurance.The bottom of the cushion is provided with anti-skid particles which can effectively prevent the displacement of the cushion. Adjustable strap multi - directional fixing, so that the air cushion more fit the motorcycle seat.