Dark gray, with a zipper. It's for women, but I think it can also be used for children. These are non-slip boots purchased for snowy days. I'm not sure about the waterproof effect, but I applied waterproof spray after purchasing them. The inside is probably a fluffy, fitted type. I've only used them once because it doesn't snow very much. The owner usually wears sizes 23.0 and 23.5 depending on the manufacturer, but I think these are closer to a 23cm size.