Are they strong enough?

Zubits magnetic shoe closures are amazingly strong! Watch this video as parkour experts put Zubits closures to the test.  Zubits magnets are balanced to stay secure during athletic activity, yet remain easy enough to take off with a forceful step on the heel.  Zubits magnets bind together with up to 18lbs of force. - How Zubits Closures Work magnetic shoelaces, magnetic shoelaces, magnetic shoelaces, hickies, hickies, hickies magnetic shoelaces magnetic shoelaces

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The Zubits Video

Start with your own shoes - lace Zubits closures through your own shoelaces - and presto - your shoes just got insanely easy. Zubits are patent pending magnetic "bits" that make your shoes fast and easy to put on and take off. No tying, no squeezing, no knots, no floppy bows, no coming undone. When the Zubits magnets are split open you have a huge opening to easily slip into your shoes.  Then just pull the magnets together and you're done.  When you want to take your shoes off, just step on your heel and pop out hands-free. magnetic shoelaces magnetic shoelaces zoobits