If you're budget-restricted, your best bet is this Portolano Beanie. It's a great item, while not very pricey. In this price range, you can also check out this Hat. It's also a popular item and won't break the bank. Or you can choose this Frye Hat - be sure you'll be making a stylish addition to your wardrobe.
For something in the middle of the price range, we've got your back with this Portolano Beanie. This product is likely to become a total wardrobe staple.