The sauna at Solei & Co. Day Spa- Sumner, in the city of Sumner in the state of Washington, features an infrared sauna system that provides a relaxing experience in a clean, modern facility. The spa offers the sauna as part of their comprehensive wellness services, with guests particularly enjoying combining sauna sessions with other treatments like massages and facials. The facility provides amenities like robes and a comfortable sanctuary space for relaxing before and after sauna sessions.