A disposable wearable absorbent article having a hook and loop fastening system, the fastening system being characterized in that it comprises: a female fastening material (107, 207, 310), which is a nonwoven material, having an overall thickness; a male fastening material with a plurality of bidirectional micro-sized hooks, wherein: each of the hooks has an overall hook height that is greater than or equal to one third of the overall thickness of the female fastening material (107, 207, 310) but less than or equal to twice the overall thickness of the female fastening material (107, 207, 310); each of the hooks includes a cap, and each of the caps has a vertical engagement effective area that: has an overall shape with at least two sides that are substantially parallel, has a width-to-thickness aspect ratio that is greater than or equal to 1 but less than or equal to 2, and is greater than or equal to 40,000 square micrometers but less than or equal to 120,000 square micrometers; and each of the caps has an overall cap height that is: less than or equal to one third of the thickness of the overall thickness of the female fastening material (107, 207, 310), and less than or equal to 120 micrometers; and each of the hooks has two arms. a female fastening material (107, 207, 310), which is a nonwoven material, having an overall thickness; a male fastening material with a plurality of bidirectional micro-sized hooks, wherein: each of the hooks has an overall hook height that is greater than or equal to one third of the overall thickness of the female fastening material (107, 207, 310) but less than or equal to twice the overall thickness of the female fastening material (107, 207, 310); each of the hooks includes a cap, and each of the caps has a vertical engagement effective area that: has an overall shape with at least two sides that are substantially parallel, has a width-to-thickness aspect ratio that is greater than or equal to 1 but less than or equal to 2, and is greater than or equal to 40,000 square micrometers but less than or equal to 120,000 square micrometers; and each of the caps has an overall cap height that is: less than or equal to one third of the thickness of the overall thickness of the female fastening material (107, 207, 310), and less than or equal to 120 micrometers; and each of the hooks has two arms. each of the hooks has an overall hook height that is greater than or equal to one third of the overall thickness of the female fastening material (107, 207, 310) but less than or equal to twice the overall thickness of the female fastening material (107, 207, 310); each of the hooks includes a cap, and each of the caps has a vertical engagement effective area that: has an overall shape with at least two sides that are substantially parallel, has a width-to-thickness aspect ratio that is greater than or equal to 1 but less than or equal to 2, and is greater than or equal to 40,000 square micrometers but less than or equal to 120,000 square micrometers; and each of the caps has an overall cap height that is: less than or equal to one third of the thickness of the overall thickness of the female fastening material (107, 207, 310), and less than or equal to 120 micrometers; and each of the hooks has two arms. has an overall shape with at least two sides that are substantially parallel, has a width-to-thickness aspect ratio that is greater than or equal to 1 but less than or equal to 2, and is greater than or equal to 40,000 square micrometers but less than or equal to 120,000 square micrometers; and each of the caps has an overall cap height that is: less than or equal to one third of the thickness of the overall thickness of the female fastening material (107, 207, 310), and less than or equal to 120 micrometers; and each of the hooks has two arms. less than or equal to one third of the thickness of the overall thickness of the female fastening material (107, 207, 310), and less than or equal to 120 micrometers; and each of the hooks has two arms.