First, spritz hair with Philip Kingsley Instant Beach Salt Free Texturizing Spray ($38; philipkingsley.com) to add grip to your strands. Next, separate hair down the middle into two sections. Starting just above your neck, take a small amount of hair from the outermost side of one section and move it to the inner side of the other section. Now, do the same on the opposite side. Continue to crisscross until you get to the bottom of your hair; add a hair elastic to keep it held tight.
THIS IS WAY EASIER THAN IT LOOKS. PROMISE.