When you make an appointment for our sauna, you will be given 1 bath towel for your session. This purchase is to rent an additional 1 bath towel for use with your sauna appointment. If you have more than one person renting the sauna at the same time, your sauna appointment already includes 1 bath towel for each participant. This purchase is to rent an additional towel. When you rent an additional towel we will put it in the sauna room and it will be waiting there for you for when you arrive for your session.