The sliding system with increased thermal insulation. There are possibilities of two, three or four- elements based on two-way system. Thanks to its parameters Ultraglide system allows to build constructions with very big dimensions of drive wings. The system ideal for the commercial buildups which require a large open space, to build up terraces, verandas, extensions and patio. The main advantages of the system are: the low treshold, the solution without the corner profile and huge shape of driving wings.