Generally synthetic blend fabrics make the best travel dresses, because they're wrinkle and stain resistant. However, knit and sweater dresses from natural or synthetic fibers are amazing for travel in colder climates. Sweater dresses look chic, will keep you warm and cozy, and won't wrinkle. Wool and cashmere are also naturally stain and water resistant (I mean, we're talking small spills, not rainstorms or full glasses of wine).