Fastener having a pocket for an extender

A fastener, comprising:

• a first part comprising a body and a male fastener element attached to the body;
• a second part comprising an elongated body having a top layer, a bottom layer, and a plurality of female fastener elements attached to a top surface of the top layer of the body and arranged at predetermined distances along a length of the top layer, each female fastener element configured to be selectively engageable with the male fastener element of the first part, the bottom layer having a slit formed therein extending transversely across the bottom layer forming a pocket entrance opening into a pocket space of a pocket formed between the top layer and the bottom layer, the pocket entrance opening having a pocket edge that is movable from a closed position wherein the pocket entrance opening is closed to an opened position wherein the pocket entrance opening is opened;
• and,
• an extender comprising an elongated body, the elongated body of the extender being an integral continuation of the elongated body of the second part, and a fold line formed transversely across the elongated body between the second part and the extender, the extender having a plurality of female fastener elements attached to a top surface of the elongated body of the extender and arranged at predetermined distances along a length of the elongated body, wherein the extender extends from an end of the elongated body of the second part, the extender being movable from an extended or in-use position to a retracted or stored position by folding the extender along the fold line inwardly toward the pocket entrance opening and inserting the extender through the pocket entrance opening and into the pocket space.