It looks like the walkway and handrails for the existing Students bridge are wood.
The competition documents say "construction shall include solutions and provision of endurable materials, which can be renewed and maintained in an easy way."
1. MARIBOR 2012 website for the bigger picture. e.g. in 'Architecture and Urbanism' they mention the extension of a pedestrian precinct/zone by connecting with the network of walking paths
2. 2 videos commissioned by the city of Maribor, showing the developments for 2012
4. LENT Festival is a major arts festival held over 3 weeks in the summer in Maribor. They brag about 400,000 visitors. Anyway, stuff happens along the riverbanks and they have 3D photos from the event.