Otto makes wind! When heat builds up indoors in summer, the slightest breath of wind is welcome: Otto helps with a gentle breeze or generates a gale! Thanks to the Otto is made of Bamboo. It is a durable wood, perfect for everyday lasting beauty. The rich warm siennas and umbers of the wood are enhanced and protected by oil varnish. High grade steel balances the natural form of the sapele wood with modern contemporary style.