A method of making a mechanical fastener and a reticulated mechanical fastener (10c) are disclosed. The method includes providing interrupted slits through a material having upstanding posts or loops, the interrupted slits being interrupted by at least one intact bridging region (22) spreading the slit material to provide multiple strands (26) separated from each other between at least some of the bridging regions (22) to provide at least one opening (24) and fixing the multiple strands in a spread configuration. The reticulated mechanical fastener can include multiple strands of a backing attached to each other at bridging regions in the backing and separated from each other between the bridging regions to provide openings. In some embodiments, upstanding posts (12) on each of the multiple strands have bases attached to the backing, and each of the multiple strands has a width that is greater than that of the bases of its attached upstanding posts.
