Cotton midi dresses work because cotton breathes and midi means your legs are covered without feeling constricted. The length is long enough to feel intentional but short enough that you can move freely and sit comfortably for hours at a time. Cotton fabric wears well through a weekend of activity and does not require intensive care. We prefer relaxed fits and simple silhouettes in cotton because the fabric itself should do the work. A collar detail or simple pocket can make it look more considered without adding complexity. These are the cotton midi dresses that handle the unpredictable social calendar of a hen weekend without demanding anything from you except the ability to put them on.