I think it'll stretch so much that it alters how it looks. I've been wearing my full blistered lamb moto, which buttery btw, and mine still looks the same as the day I bought it. Sleeves aren't exactly like jeans where it is under pressure when you sit down, you'd have to be flexing and holding it in that position for hours for that to happen. I don't know though, it might happen to Kunk but that is because of his build, not many are built like Kunk though. Well at least not many that wears RO.