Abstract: An attachment system may include a panel and a flexible length of strands. The panel has a first face, a second face, an edge between the first face and the second face, and an opening extending through and non-parallel to the first face and the second face. The flexible length of strands extends through the opening. The flexible length of strands includes a first portion of the length comprising bundled portions of the strands extending along the first face and a second portion of the flexible length comprising splayed portions of the strands extending from the first portion along the second face. The splayed portions of the strands are bonded to the second face.

Abstract: A pack that includes a bottom, a front side, a back side, and a top opening for allowing insertion of articles to, and removable from, inside the pack. The front and back sides of the pack are adjacently affixed to each other at their left and right edges. The pack further includes a closure arrangement to close the top opening, such closure arrangement including an upper front flap, adjacently connected to the front side and an upper back flap adjacently connected to the back side. The pack is closed when the upper front flap and the upper back flap are pressed against each other and then rolled down together along the pack until a rolled state of the upper front flap and the upper back flap is reached.