If you're budget-restricted, this Moon River Shell Top will fit the bill. It's a foolproof choice, while not very costly. Another strong contender for your wardrobe is this Asos Sleeveless Top. While the price of this piece is competitive, it will certainly attract a lot of attention. You may also want to look at this Shell Top. This item is not expensive either, but it will make a difference in your wardrobe.
If you're looking for an item in the middle of the price range, we've got your back with this Paul & Joe Shell Top. This product is bound to become a total wardrobe staple.