Small tanks on the side of the titanium and aluminium frame boots hold enough fuel to cover a distance of approximately 20km. Also known as Saigak boots after a type of antelope, this quirky example of human augmentation are intended to limit the muscular exertion required to run rather than produce superhuman speed, and they also deliver a sensation of flight to the wearer according to inventor Viktor Gordeyev from the University at Ufa in the Southern Urals.