Zzz Top is worked in the Tunisian crochet entrelac technique. Each element of the top is small enough to place all of your stitches on a regular crochet hook.
The top is worked top down, starting at the back neck. No seaming is required.
The pattern assumes basic familiarity with Tunisian crochet, specifically how each row is worked as two separate passes and how to work the Tunisian simple stitch. The Details section on page 3 explains each element of the pattern.
It also is a perfect “be your own designer” pattern, because of all the possible modifications which can be done easily and without any complicated calculations.