Up to now three types of covers have been used on monopiles by the offshore industry. Tent covers, steel- and aluminium covers. All three have disadvantages. Tent covers are not suitable in wintertime. At high wind speeds there is a risk that they are blown away, contaminate the sea and leave the monopile unprotected. The steel and aluminium covers are quite expensive and the recycling process of the cover requires a lot of energy again with aluminium being the top energy consumer. As monopiles often differ in diameter per project, none of the steel or aluminium MP covers have been reused on a new project up to today.