Roller blinds are a direct canvas of a special, hard woven material, in composition, as a rule, it is high-quality polyester, sometimes with the addition of cotton or linen. This material is treated with a special impregnation that prevents the collection of dust and gives the necessary rigidity of the fabric itself. At the bottom of the canvas is set weighting bar – plumb. Due to this, the fabric with ease and without deformation is wound exactly on the shaft using chain, spring or electromechanical control.