Alder (Alnus glutinosa) is a relatively soft wood and therefore also comfortable in spas and saunas. Beautifully reddish and clear natural wood, untreated. Alder wood is the best choice for the sauna environment. Also tolerates high temperatures, for example on glazed balconies or sunny terraces. This untreated version is for indoor use in dry conditions. For outdoor use or for saunas, bathrooms and spas, should be treated according to usage. Why not paint it your favorite color! Please note that cushions are sold separately. EcoChairs are shipped unassembled in flat packs. Comfortable Ecological Foldable Customize your EcoFurn product - your landscape, your colours!