If you can’t spend much, this Tote Bag will fit the bill. It's a fail-safe choice, while not very expensive. In this price range, you can also take a look at this Izola Duffel Bag. It's also a popular item and won't break the bank. You might also want to consider this Baggu Duffel Bag. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.