I received the Chiro Doc heated seat cushion in exchange for honest review. The cushion came with the cushion, the cover, and the usb heating pad. The pad is removable.
The pad heats up within a minute or two. It does provide comfort for back pain, lower leg pain, and even helped with a bit of menstrual pain. In my opinion, the pad was good for an hour or less at a time. You will need to be near a usb outlet or power bank to use the heating pad. Make sure to disconnect when you are about to move from the seat.
You also need to be careful when moving because the cord is thin. Also please note which side is the heating side of the pad. I placed the pad in wrong at first and I did not feel the heat as much until I flipped it around.
You can purchase the seat cushion using the link above.