The exterior features a dark asphalt shingle cladding. The material is dense and durable, offering reliable waterproofing and weather resistance suitable for long-term outdoor use. The roof and walls are uniformly clad, presenting clean, sharp lines and an overall modern appearance. The matte finish of the asphalt shingles gives the structure a low-key, grounded visual presence that blends naturally with its surroundings. At high temperatures, the interior releases a light, subtle woody aroma. The sauna stove heats up quickly and maintains a steady dry-heat performance. The compact spatial layout provides effective insulation and comfortably accommodates multiple users. The black asphalt shingle shell also contributes to heat retention, reducing thermal loss while requiring minimal maintenance over time.