In good weather there is no need for special equipment. What you need is food and beverage packed in a small backpack. If you want we can provide that for you.
You can bring or rent sticks for Nordic walking. Use appropriate clothes for time of year and temperature. On a normal summer day you can walk in sneakers but in damp weather you need walkingboots.
If there is continuing pouring rain we offer guided walks in the museums of Norrköping as an alternative.