A fitted cotton tank top is simple but effective for smart casual dressing. Cotton breathes and feels good against skin without any pretension. The fitted cut means it works under blazers and button-downs without adding bulk. Cotton holds its shape through washing and wearing better than synthetics do. These work in white for basics or in neutral colors for variety. You can dress them up or down depending on what goes over them. The simplicity is the point. These fitted cotton tank tops are not trying to be anything other than what they are—reliable pieces that make layering work and fit under structured clothing without looking sloppy.