Tail Bone Pain Relief Cushion - Ergonomic "U"Shaped Cutout alleviates pressure on the sciatica nerve reducing back, leg, butt, and coccyx/tailbone pain caused by sitting uncomfortably for hours. Whether you use it as a seat cushion for car or chair cushion for desk chair, you will notice the difference. Multifunctional and Lightweight - Our Sitting pillow has a non-slip rubber grip bottom and a carrying handle. It's lightweight and portable so you can take it anywhere. You can use it as a car seat cushion, desk chair cushion, wheelchair cushion or a sitting pad for any uncomfortable seat.