Biosphere Reserves are not covered by an international convention, but are internationally recognised and protected with support from amongst other organisations the World Wide Fund for Nature (WWF), The United Nations Environment Programme (UNEP) and the World Bank.
Overbergers were honoroud by being chosen by UNESCO (United Nation's Educational Scientific and Cultural Organisation) to participate and register the Kogelberg Biosphere Reserve under UNESCO's Man and Biosphere Programme (MAB). As of July 2003, 97 countries have established 440 biosphere reserves.
The Kogelberg Nature Reserve forms the largest part of the CORE area of the Kogelberg Biosphere Reserve.
Known as the "heart of the fynbos", it is home to more than 1600 plant species making it one of the world's riches sites of plant diversity. UNESCO's World Heritage Committee declared the unique Cape Floral Region to be of "outstanding universal significance to humanity" and it has been identified as one of the world's 18 biodiversity hot-spots.
Private and municipal nature reserves, the Harold Porter National Botanical Garden, the Palmiet River estuary, sections of the coast and the marine area comprise the BUFFER ZONE while local towns, farms and plantations make up the TRANSITION ZONE.