Vtg Sorel Manitou boots

Vintage boots, need a little tlc to soften them up again but all in all in really good condition. I’m not sure if the rubber is yellowed or came that way because it’s very evenly toned, I have not tried to clean them but I heard using tire shine really livens them up again. Liner’s are in great shape, a little piling and could use a wash but no holes or major wear. No size tag in these, I think the bottom is saying they are a womens 9 but it’s hard to read, I’d say they fit closer to a 9.5 with thick socks or 10