How does Velcro stick and unstick?
Velcro's Tiny Army
How does Velcro stick and unstick?
You pull apart your shoe strap — rrrrrip! — and there's that satisfying sound. Press it back together — scrunch! — and it holds tight again. How does Velcro grab on so perfectly, then let go so easily?
Velcro has two sides that are completely different from each other. One side is covered in thousands of tiny soft loops, like miniature yarn circles. The other side is covered in thousands of tiny stiff hooks, like microscopic fishing hooks. Neither side does anything special on its own.
