A white button-down shirt dress is the ultimate layering neutral and it belongs in your closet for that reason alone. White works under literally everything from earth tones to jewel tones to bright colors. The button-down functionality means you can leave it unbuttoned over a tee or button it up completely depending on what you are layering with. Quality matters here because cheap white fabric reads as cheap under other clothes and good white fabric elevates everything it touches. The shirt dress silhouette gives you definition without fussiness. Button-down details and a collar give it structure. This is the shirt dress that never needs to be the focal point but somehow makes everything you pair it with look better.