The sauna concept “Pattern of growth” creates a unique sauna atmosphere due to the constructional use of hundred-year-old tree trunks. Due to an innovative manufacturing process and artistic workmanship the natural form of the tree trunks is retained. Every sauna becomes unique, reflecting all facets of tree life with its branches, cracks and age rings. The seats and lounging surfaces made of pine tree trunks present an interesting contrast to the purist style of the walls.