I once sewed such a sweatshirt based on the RK-900 jacket according to the customer's author's sketch. Large illuminated hood, as well as illumination on the back.
In general, I don’t particularly like working
with footer and knitwear, I don’t have the equipment for this, except for a
household machine and an overlocker, but sometimes something suitable turns
out. They tell me so much that hoodies are a profitable topic, but I don’t even
know, I’m still a cosplay master, not a designer.