It can be easily undone on purpose, simply by pulling on the loose ends deliberately. And it forms a relatively strong knot, unlikely to come undone during the course of a day of moderate walking.

(To make a strong knot, cross the left lace over the right and pull it through the resulting loop. Form both the right and the left lace ends into loops and wrap the bottom of the right loop ...

which can be easily untied by pulling on the loose end. Watch the video This simple knot makes an adjustable loop anywhere on a rope. Easy to tie and untie, this fairly strong knot is often used ...

or metal ring), this is a useful knot because it’s easy to make and pretty strong. It’s basically a loop-de-loop: Wrap the line around your anchor, pull the end through the loop created ...

Pull the two ends of the rope to tighten the knot, and you're there! When done correctly, it'll look exactly like this beauty above—a useful loop with a strong butterfly-shaped knot below it.

Pull the two ends of the rope to tighten the knot, and you're there! When done correctly, it'll look exactly like this beauty above—a useful loop with a strong butterfly-shaped knot below it.

If you pull on the reef knot ... they'd learned and came up with basic rules that would let them identify strong knots and weak knots without having to do a bunch of rigorous calculations.

Scientists from Johns Hopkins University showed participants pictures of knots and asked them to point out the strongest one. Amazingly, they found that most people struggled to tell a weak knot ...

Yet despite deep familiarity with knots, most people cannot tell a weak knot from a strong one by looking at them, new Johns Hopkins University research finds. Researchers showed people pictures of ...