I needed a new basic skirt as well!
I picked up this Grey Marl for 2 Euros. I didn’t put a zip in it because I wanted to keep it cheap and easy. So I added a bind at the top of the skirt. When you do this with a stretch fabric you need to remember to stretch the fabric slightly when you stitch it together. This will ensure your threads don’t break / snap when you try and slide it over your bottom!
Alternatively you can always put a zip in it.