Anything that says it is made from “sheepskin” is made from sheepskin. Many people think they are slaughtered just for the sake of slaughtering them to make beautiful things, but it is an ancient practice to slaughter an animal for food and use the skins and furs for other uses. People even use sheepskin for medical purposes.
You can learn more at sheepskintown about it. I did not realize people used sheepskin for medical conditions or to prevent them.