Flat cap
From Cantr II Wiki
Description: a soft tweed cap with a small brim in front, to which the front of the cap has been attached to give it its characteristic shape
Raw materials: 65 grams of wool cloth, 10 grams of silk cloth
Days: 1
Tools: iron, bone, or seashell needle
The silk is used for lining so it's not visible when the cap is worn.