Cushy Tushy Premium Slim Foldable Travel Seat Cushion - for Relief of Lower Back, Sciatic, Butt and Tailbone Pain - for Home & Office Use, Perfect for Travel or Driving - Slim Coccyx Seat Cushion

I bought one of these which helps a lot, as long as my legs are still at a 90 degree angle at the knees. Cushy Tushy Premium Slim Foldable... https://www.amazon.com/dp/B0G35WNL35?ref=ppx_pop_mob_ap_share