The side fabric guiding system keeps the blind close to the window surface, thanks to it the blind adheres well and does not protrude or stick out, allowing you to cover tilt windows (without the so-called fabric leaning / sticking out):

Without guides: the "window cover" system will not have side guiding of the fabric/material

Line: basic guiding by means of an "invisible" transparent line (cord), which is directly tied to the upper part of the roller blind and to the lower part of the window frame with special holders

(fabric "side guiding" options do not affect the price)