The Autumn Waves Slouch/Cowl is both in one. It is closed at the top to be worn as a hat. Left open, it is worn around the neck as a cowl. This written pattern is also worked to measurements. Any yarn, hook and gauge can be used. The measurements are provided in the pattern.

Coordinating patterns:
Autumn Waves Sweater: http://www.ravelry.com/patterns/library/autumn-waves-sweater
Autumn Waves Skirt: http://www.ravelry.com/patterns/library/autumn-waves-skirt