A mechanical fastener is disclosed that includes a thermoplastic backing and multiple, upstanding fastening elements that have a post with a proximal end attached to the thermoplastic backing and a distal end comprising a cap larger in area than a cross-sectional area of the post. The basis weight of the mechanical fastener is in a range from 25 grams per square meter to 75 grams per square meter, and the height of the multiple, upstanding fastening elements is up to 300 micrometers. Fastening systems and disposable absorbent articles including the mechanical fastener are also disclosed.本發明揭示一種機械式緊固件,該機械式緊固件包括一熱塑性襯底及多個直立緊固元件,該多個直立緊固元件具有一支柱,該支柱具有附接至該熱塑性襯底之一近端及包含一頂蓋之一遠端,該頂蓋之面積大於該支柱之一橫截面積。該機械式緊固件之基重係在自25公克/平方公尺至75公克/平方公尺之一範圍內,且該多個直立緊固元件之高度係高達300微米。本發明亦揭示包括該機械式緊固件之緊固系統及拋棄式吸收物件。