The Site is the largest mountain bog complex in Poland and is located along its south-western border with Czechia. The dominant vegetation type is a community of mountain pine Pinus mugo, spruce forests, non-forested sphagnum-dominated communities, and extensive poor fens situated near the bogs’ boundaries. These bogs and fens feature subalpine tundra vegetation, with a combination of arctic, subarctic, artic-alpine, and circumboreal species. Animal species present in the Site include the Boreal owl Aegolius funereus, the Eurasian eagle-owl Bubo bubo and the Eurasian black grouse Lyrurus tetrix, all protected under Annex I of the European Union’s Birds Directive. The wetland plays an important role in flood protection, carbon sequestration and storage. It also provides scientific and educational opportunities in addition to being of recreational and touristic value. The area is adjacent to similar large mire complexes on the Czech side of the River, which have been designated as Jizera Headwaters (Ramsar Site no. 2074).