Sitting down puts pressure on the Sciatic nerve, which causes sharp, radiating pain in your bottom, hips and thighs… And now you can get welcome relief with this Sciatica Cushion. Unique bicycle shape seat is specially designed to take the pressure off your thighs and bottom, that’ll ease sciatica discomfort while you sit. So now you can sit comfortably for hours at home, while travelling or in the office too! Removable/washable cover. Polyester, Cotton. 36.5cm L x 27cm W.