Very stiff
It's hard to know what size perm rods to order on line.  I found these very difficult to use - it was challenging to get the little ends into the holes - very tight rubber band (good for keeping them in place, though) was difficult with slippery fingers from the product.  But it may be just that my hands are older now.  I prefer the rods that clip in place rather than this style with the rubber bands.
Rating: 2 stars