The trick was to invent a loop that the hook could calch onto. with stiff hooks and soft loops,de Mestral would have the basic components of a fastener that people could use on their clothes. However, it took a loug time to perfect his invention. For eight years, he experimented and perfected his unvention which consists of two strips of nylon fabnc one strip contauns thousands of small hooks The other strip contaans small loops These tiny hooks and loops were attached to a strip of myson when the rwo strips are prevued together. they interlock and form a strong connection with the help of a weaver from a textile factory in France.