Old Navy Mustard Yellow Button Front Midi Dress | Cottagecore Linen Blend Sundress | Size Medium Sunshine in dress form. Mustard yellow midi dress from Old Navy featuring a flattering button front, adjustable spaghetti straps, stretchy smocked back, and an easy flowy silhouette. The textured linen blend look and warm golden color make it perfect for summer, farmers markets, vacations, and everyday wear. Brand: Old Navy Size: Medium Condition: Good preowned condition with normal wash wear. No major flaws noted. #oldnavy #cottagecore #mustarddress #mididress #summerstyle