Velcro

It's so awesome that you could shout out, "Why didn't I think of that?"

Well, you probably weren't born yet. If you were, don't fret; things have a way of seeming obvious in hindsight.

Velcro is an early example of biomimicry in clothing. For hundreds of thousands of years, burrs have been attaching themselves to human clothing. There was little practical application of this. Time, as it is wont to do, ground on. Roman centurions were hooked by burs. Druids came under their hooky influence. Maori chiefs weren't immune.

Well, people still aren't immune, but the bitter sting of being burred is more than offset by the simplicity fastening of velcro endowed fabrics.