Alright here’s the secret: You need a bandana to pull this trick off. Soak it in water.
It helps to soak your hair too.
The first step toward putting the bandana on your head is to drop a corner down into the middle, like this.
The corner that you folded in goes across your forehead.
Make sure that the sunglasses’s temples sit a bit high over your ears. As you wrap the bandana over your head make sure to catch the sunglasses’s temples underneath it.
Now take the two side flaps and tie them over the bottom flap. Pull them down low. As you do this make sure the sunglasses’s temples are still in place underneath the bandana.
Like this. Before you tie the bandana knot tight, make sure to pull all the slack out of the bottom back flap down as far as it will go. I repeat: Make sure you tie the knot low. Nothing pisses me off more than watching some n00b flounder around with a flailing bandana back flap or a sloppy bandana knot.
This is what I mean by pulling the slack out of the back flap.
Make sure the bandana is very tight and that the sunglasses’s temples are tightly secured underneath the bandana. Press the sunglasses’s lenses into your face. If you did it right, the sunglasses’s temples should be pressed so tightly against your skull by the bandana that it actually hurts a little.