Features:Brand New and High QualityFirm Bubble Padding Provides Support at Important Sensitive Pressure PointsRolling Massage EffectReduces Back Tension， Aches and PainsEasily Attach to Most Chairs and Car Seats with Elastic Straps to Secure Cushion in PlaceMaterial: Sponge， magnetColor: BlackSize: 91*44 cmPackage Including:1 X Car magnetic seat