This really neat hat can be worn as a beanie or as a slouchy. The hook size determines that for you.
If you would like more of a beanie fit, use a 4.0 mm or F size hook. If you would like a slouchy idea, use a 4.5 mm or size G hook.
This is using Sun City by Schachenmayr yarns. This is a free pattern. It’s available in PDF Format only. You will find the pattern on stores that carry this particular yarn. This type of yarn is typically found in independent retailers.
Get the free pattern and video tutorial at http://thecrochetcrowd.com/crochet-pipeline-hat/