About This Item The "Black" Relax Sauna boasts a high-tech aesthetic, constructed from thicker nylon and featuring a reflective silver interior for enhanced performance. With a slightly shorter session time and perceived increased strength compared to the Silver model, it provides an efficient and impressive sauna experience. Specifications The "Black" Relax Sauna features a sleek, high-tech design with a durable nylon build. Compact and efficient, it comes with a chair, has a reflective silver interior, and a shorter 17-minute session time, making it a portable and effective heat therapy solution. Why We Chose This The Relax Far Infrared Black Sauna is chosen for its efficient design, which enhances the sauna experience by utilizing a thicker nylon material and a reflective silver interior for better heat retention. The black model is slightly stronger than the silver version, offering a more intense sauna session in a shorter time, making it ideal for those seeking a potent and efficient infrared sauna experience.