If you're looking for a thrifty option, your best bet is this Nike Cap. It's a terrific product, while not very costly. Another savvy option is this Carhartt Cap. While the price is not very high, be sure that this product will become a great addition to your wardrobe.
For something in the middle of the price range, we've got your back with this House of Holland Cap. This piece is bound to become a total wardrobe staple.