Guarantee: Models: 2021. Delivery: 1-3 Working Days, 1 Year Return Guarantee With Free Returns. Simply Order And Without Worries.With Removable And Up To 40 Washable Polyester Cover (Black With Zipper) With Anti-Slip Knobs On The Underside.Also For Long Car Journeys As A Comfortable Seat Pad, As A Lumbar Support Cushion. Sitting Healthily And Comfortably Ideal Relief For Any Weight Breathable And Climate-Regulating. They Cause A Reduction In Shear Force And Shock Absorption While Sitting.The Pillows Are Made Of Gel (Soft And Cuddly) That Is Held In Shape By A Plastic Film. The Deformable Gel Adapts To The Body. This Results In An Even Distribution Of Pressure And Shock Absorption. In Addition, The Flow Properties Of The Gel Reduce The Shear Forces.