My daughter has a metabolic disorder called MCAD, she tends to have a hard time controlling her body temp and has one of these stuffed animals. She has the turtle since its larger and can cover the most area of the core body. It helps her cool down when she gets really hot and made me think...these would be good for people with Lyme Disease! I have a hard time controlling my body temp too and over heat easily, never used to be that way. Check out the link!!