Zhijun Wang, a young man from Beijing, has taken the internet by storm after creating a face mask made from parts of running shoes. Necessity was indeed the mother of invention - Wang fused his passion for running with a desire to do protect himself against the Beijing smog and designed a mask using old pairs of trainers. He started making the masks with limited edition sneakers in 2012 and slowly grew his business over the past four years. Wang now sells his running shoe masks to customers all over the world.