Are these the most sustainable seats in existence?

Are these the most sustainable seats in existence?
Windchairs and windstools are manufactured with wind power

Designer and knitting miller Merel Karhof has collaborated with a colour and saw miller to create 'windchairs' and 'windstools' manufactured exclusively by wind power. 

This beautiful video, featured on Designboom, illustrates the wind-powered process, from sawing the wood to dying the wool and knitting the cushions: 

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