During these festivals, participants often dress in traditional outfits such as dirndls and lederhosen. For the Schuhplattler, lederhosen and dirndls are a must. The hostesses wore sky-blue dirndls as a promotion of Bavarian cultural heritage. Viennese seams are often used in women's blouses and traditional dresses such as dirndls. Oktoberfest dirndls tend to be more colourful and revealing. Today, dirndls vary from simple off-the-shelf styles to exquisitely crafted, very expensive models. Traditional dirndls vary in design between regions and even villages.