The covers are made of a reinforced cotton blend fabric (50% polyester, 50% cotton) or Dolan® (100% acrylic fabric). An air vent is generally included. These fabrics are water-repellent and have been impregnated with a finish that inhibits mold formation. However, this does not guarantee total water impermeability under prolonged exposure to rain. Aprons and tarpaulins can be fitted as on our The Klassiker.