Most red dresses fail the heat test. The color is perfect, the silhouette is right, and then you wear it on an actual warm day and spend the next three hours miserable. Cotton fixes that. A well-made cotton red dress gives you everything the color promises without the synthetic fabric that traps heat and loses its shape by noon. We’ve pulled together our favorite red dresses in cotton specifically because this combination gets overlooked and it absolutely shouldn’t be. These are dresses that wash well, hold their color properly, and feel genuinely better the more you wear them. Some are crisp and structured. Some are softer and more relaxed. All of them breathe. Red in cotton also has a quality that synthetic fabrics can’t replicate, a slight texture and depth that makes the color look more considered, less costume. These are the red dresses you reach for all summer and still want to wear in September.