The hoverboard is constructed from an insulated core, containing HTSLs (high temperature superconducting blocks). These are housed in cryostats - reservoirs of liquid nitrogen that cool the superconductors to -197°C. The board is then placed above a track containing permanent magnets.When the board is cooled to its operating temperature the track’s magnetic flux lines are ‘pinned’ into place, maintaining the hover height of the board .