Interesting fact:

As you already know, you need to take the blade of the tie and wrap it under the tie’s neck. Now, when you feed the blade back through the knot in front of you, be sure to stuff it through both of the loops you formed instead of just one. Then, with your left hand on the tail and your right on the knot, pull the knot towards your neck. Once you pull tight, you should see a normal-looking knot and then a partially visible sub-knot beneath it. This extra layer will add a degree of class that the Four-in-Hand simply doesn’t provide. What more could you want?