If you're on a thrifty mission, your best bet is this Portolano Hat. It's a wonderful piece, while not very expensive. Another strong contender for your wardrobe is this Hat. While the price of this product is competitive, it will surely attract a lot of attention.
If you're a bargain hunter, look no further than this Portolano Knitted Hat. This item won't break the bank, but absolutely essential in your wardrobe.