Closure for a spout of a flexible thin-walled packaging

A closure for a flexible thin-walled packaging, the closure comprising:

• a rigid overcap, directly or indirectly applicable to a spout of the flexible thin-walled packaging, the rigid overcap comprising an annular overcap wall extending along a main axis (X) between an overcap base and an overcap wall edge, said annular overcap wall being made of a first plastic material;
• a collar, coaxial to the annular overcap wall, suitable for being inserted on a grip portion of the spout so as to remain axially bound to the grip portion;
• and
• a flexible lace connecting the collar to the annular overcap wall;
• said rigid overcap further comprising a plurality of fins, protruding radially externally from the annular overcap wall, an annular grip wall, continuous or in sections, made integral with the annular overcap wall by said fins, by virtue of the fins, the annular grip wall being radially spaced from the annular overcap wall, forming axial anti-suffocation passages,
• wherein said flexible lace is made by bi-injection, together with the annular overcap wall and the collar, of a second plastic material, different from the first plastic material.