One-Handed Magnetic Zipper

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You might've heard about Under Armour's crazy new zipper that only requires one hand to zip. Though the futuristic magnetic clasp jigsaws nicely with the company's high-performance standards, the zipper was originally had more humble origins: helping a sick man lead an easier life.

The Quickzip story starts in upstate New York, hundreds of miles from Under Armour's massive research and development center in Baltimore, Maryland. Engineer Scott Peters' Uncle Dave was living with myotonic dystrophy, a degenerative disease. Among the condition's many, variable consequences is a loss of muscular dexterity in the extremities, and for Peters' uncle, that meant zipping up a coat in the long, miserable winter near Buffalo, New York was a terrible burden.

So Peters and his mother Nancy, a career occupational therapist, decided they were going to make a zipper to help Dave out. In a crude early prototype, they attached magnets on the two sides of a stock YKK fastener, and when they stuck together with a satisfying clink, they knew they were on to something.

The Peters formed a company called DNS Designs with their partner, engineer Dave Lyndaker. For the next few years, the they evolved the zipper design on nights and weekends, trying to figure out how to improve the ubiquitous closure for people with uncommon illnesses. All along, their bar for success was whether or not they'd found the solution that made Dave's life easier. "He was our tester," says Peters. "We would make prototypes and test them ourselves. Then once we were satisfied we would sew them into jackets and give them to him to try. If it didn't work for him then we knew we were off the mark and we would go back to the drawing board."

The jacket zipper has been a staple of industrial clothing for at least a hundred years. The original "clasp locker" originally debuted at the 1893 Chicago World's Fair. There are a few varieties of zippers, but the basic principle remains the same across each: Pull a hand-operated slider in one direction and it locks together two rows of teeth, forming a closure. Pull the slider the other way, and it unlocks the teeth.

In the case of a jacket or a hoodie, the slider employs a "box and pin" design. Stick the pin into the box to lock the teeth into alignment, then pull the slider. It's ubiquitous because it's simple, it's cheap to manufacture, and importantly, it's crazy practical. That is, until jamming the pin into the box is impossible because your beautifully evolved ape digits suddenly don't dance with the quickness they used to.

After the Peters' early prototype was done, it was pretty clear that magnets could provide the force needed to make a closure, but there was no simple way to leverage magnetic force to jam a pin into a box. So after lots of experimentation, the team eventually settled on a "hook and catch" design to replace the traditional closure. Instead of threading a pin into a box, the magnets pull a hook-like pin over the top of a catch, which settles itself into place, locking the first set of teeth together. The user then grabs hold of the slider and pulls the zipper closed with ease.

Last year, DNS Designs received a patent for a "self-aligning zipper," which they understandably planned to market as a medical device—a niche product for people like Uncle Dave. After discovering the prototype at a trade show, however, Under Armour saw the Quickzip's potential as a performance product. Sure, the zipper could be fastened and operated by people who had limited dexterity, but it could also serve athletes who needed to be able to zip and unzip quickly without thinking or expending too much energy. Consider the cyclist in training peeling of layers, or the football player fumbling with a giant coat during a freezing December playoff game.

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