Swivels 360 Degrees: The Ez Swivel Seat Cushion Swivels 360 Degrees Around It?s Center Axis To Help Rotate Hips And Legs Non-slip Base: The Undercoated Non-slip Base Will Ensure That The Cushion Stays In Place On The Seat While Getting Out Of Vehicle Universal Fit: Use The Swivel Seat Cushion On Flat Surfaces And Contoured Bucket Style Seats Of Any Vehicle Pivot And Rotate: The Swiveling Cushion Makes It Easier To Rotate Hips And Pivot Legs Out Of The Car Padded Cushion: The Padded Cushion Is Soft Comfortable And Easy To Sit On During Long Road Trips. Diameter: 18?; Color: Blue