I ordered these back in April, I was really excited about using these because the ones that go under your feet slip off when I run and the ones that snap to your socks come undone when I run too. I was already a little annoyed when they came because one of them had a defect in the center strap, the little black part that adjusts the length wasn't on right so it doesn't hold. I decided to use them anyway and last week I noticed that the teeth on one of the straps was gone. I really like the concept of these but um disappointed in the quality :( I will update later with pictures.
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