It took de Mestral nearly a decade of trial and error to create a fastener that would cling as well as the burrs. In early trials, the loops were too big for the hooks, or the hooks were too big for the loops. Together with a skilled French weaver, de Mestral eventually learned how to make nearly indestructible burr-like nylon hooks. And the men developed a fabric that the “burr” side would stick to.
Velcro’s® name is derived from the French velours (velvet) and crochet (hook). In a magnified view you can see the hook and loop strips of nylon that make up Velcro®.
Today Velcro® is everywhere. It’s used in sneakers, backpacks, jackets, wallets, watchbands, and children’s toys. It even turns up in places you wouldn’t expect it. Velcro helped hold a human heart together during the first artificial-heart surgery. NASA uses Velcro® to keep equipment from floating about in US space shuttles, and on the insides of space helmets so that astronauts have a rough surface to scratch their itchy noses and chins.