Oversized White Cotton Button-Down Shirt

The white button-down is the single most reliable piece in the clean girl wardrobe — and this one does it absolutely right. Cut in a relaxed, slightly oversized silhouette from crisp, breathable cotton, it drapes beautifully whether you wear it fully open over a tank, knotted at the waist, or neatly tucked into tailored trousers. The clean white is a blank canvas that works with every color in your closet, from soft camel to bold cobalt. It's one of those pieces you'll reach for constantly because it makes everything around it look better. Style tip: the half-tuck into straight-leg jeans is the effortless clean girl moment.