If you're a frugal shopper, this Diesel Knitted Hat will fit the bill. It's a fail-safe choice, while not very expensive. Another strong contender for your wardrobe is this Diesel Beanie. While the price of this piece is rather reasonable, it will surely attract a lot of attention.
If you're after a bargain, consider choosing this Diesel Hat. While the price is very reasonable, this product is an easy wardrobe update.