I'm a fan of SUPRA and have been collecting them. They're yellowed; the whole thing is yellowed. I've been storing them at home, so I think the color has changed due to things like sunlight. They might become clean if bleached. The shape is still good enough to wear. I bleached them once a while ago, so the black parts inside have turned brown. I can't quite bring myself to throw them away, so I'm hoping someone will take them!