Can you tell me what the name of the pillow Michelle used for her sciatica pain? She said it had balls of air that leveled out when you sit on it.

I'm asking for my 37 year old daughter who has the exact same symptoms as Michelle with her sacroiliac pain. Went through same tests etc., found nothing. After many therapists, shots etc. she found a chiropractor that is helping to get her in alignment. Needs help in the car as hip pain and burning in legs are very painful.