What eats mulberry moths?
Moths are eaten by just about any other creature on the earth, like all creatures there are predator and prey, it just happens the moth is prey, as it only feeds on plant material, which could be concidred a form of predation on a lower form of life. So much for the vegan argument.
If something is eating your sweaters, it is probably moths. There are several remedies for moths eating your clothing. One is to hang cedar in your closet, but there are specialty moth repellants, like moth balls, but of course they present other hazards (like being toxic when eaten by a child or pet).