<https://revolutionracegear.com.au/product/cobra-air-lumbar-support/#product>
<http://schema.org/description>
"This optional Cobra Lumbar Cushion is designed for drivers wanting additional support from their Cobra seats. Featuring an air bladder, this cushion is attached behind the seat back padding. The tube is then runs along the bottom and thigh cushion, exiting the seat near the lower front portion. The bag can be inflated and deflated using the hand pump."
<https://revolutionracegear.com.au/product/cobra-air-lumbar-support/>