Sheet material arrangement

A sheet material arrangement, comprising:

• a flexible primary sheet material;
• at least one edge member connected to the primary sheet material along an edge portion of the primary sheet material
• the edge member comprises a band-shaped secondary sheet material and an insert;
• the secondary sheet material, together with the insert, defines a structure with first and second legs, with the second leg comprising a portion of the secondary sheet material that is looped around the insert transversely to a longitudinal direction of the secondary sheet material, and the first leg comprising adjacent portions of the secondary sheet material, with the second leg being connected to the first leg so as to be pivotable about a common pivot axis extending in the longitudinal direction of the two legs;
• the pivot axis is arranged at one of the longitudinal edges of the first leg and between the longitudinal edges of the second leg;
• and
• the second leg being pivotable into a position in which rolling up can take place and in which the second leg is aligned substantially parallel to the first leg.