DOES SCIATICA PAIN MAKE SITTING UNBEARABLE? This therapeutic cushion is designed to take the weight off your thighs and bottom, helping to eliminate the sharp radiating pain of sciatica. Unique design helps take pressure off your sciatic nerve, which can aid in relieving lower back and leg pain. Removable, washable zip-off polyester cover. Replacement cover available. 15.75”x11”x3”.