Description from book:
The delightful hat is stylish, easy to make, and the perfect “roll-up”. The brim rolls to create a versatile edge to be worn with a big roll or a smaller role on a cold day when it needs to be pulled down to cover ears. It rolls up in a purse or suitcase and comes back to shape, making it a great travel companion. Embellishments such as twisted ropes or braids can be added to make this a very personal cloche.

This pattern is from the mystery knitting novel, Dyer Consequences by Maggie Sefton.