PREMIUM SPRUCE & THERMALLY TREATED ASPEN TIMBER
The Kuusi blends the best of both worlds: a light-toned spruce exterior and a thermally treated Aspen interior for true spa-level comfort. Spruce offers a strong yet lightweight structure with low thermal conductivity, helping retain heat efficiently while maintaining a clean, modern Scandinavian look. Its pale finish also gives you the flexibility to stain or customise the exterior to suit your home.
Inside, thermally treated Aspen shines. Designed to withstand repeated heating cycles, it resists warping, shrinking and cracking. It stays comfortable against the skin, doesn’t overheat like dense hardwoods, and features a soft, neutral scent perfect for those who prefer a calm, balanced sauna environment.

































