Is it possible to restretch a fleece hoodie that shrunk when it was dried on too high a temperature (a friend's dryer in another country, I didn't realize how high the setting was). The nylon zipper is now a roller coaster, the sleeves too short and it sits high on the waist instead of hitting my hips. I saw one can restretch wool, but what to do with a 100% polyester hoodie?
A lot of times you can just run it through the washer again, then hang it to dry. It will usually stretch out some on it's own, but you can also stretch it by hand. Put it on the hanger, zip it up then hold on to the shoulder seams while pulling the bottom seam down. Hold the top fo the zipper & pull down on the bottom end to stretch the zipper. Hold the shoulder & armpit seams while pulling at the cuffs to stretch the arms.
May not work for you, but I've stretched shirts a couple or more sizes doing this.