If you are on a budget, your best bet is this Hat. It's a great item, while not very pricey. In this price range, you can also take a look at this Dondup Hat. It's also a popular item and won't break the bank. You might also want to consider this Altea Hat. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for something in between pricewise, look no further than this Mühlbauer Hat. This item doesn't cost too much, but absolutely indispensable in your wardrobe. You can also look at this Dsquared2 Hat. It's an attractive option both price and quality-wise. And do check out this Hat! It's a very popular item and good value for money.
If you're not a thrifty type, then what you're looking for is this Hat. It's more expensive but worth your money. Another product we're drooling over is this New Era Baseball Cap. It's expensive but you get what you pay for. And how about the luxurious Pinko Cap? Yolo, right?