Ensure A Healthy Mix of All Kinds of Pillows! 

You can't guess what kind of sleeping position the guest prefers, and you don't have to. However, you can try to make sure that there's a variety of pillows that your guest can choose from depending on their preferred sleeping position. See more at https://www.hotels4humanity.com/pages/hospitality-bedding-blogthe-best-hotel-pillows-and-how-to-pick-them/