Do clothes moths eat man made fibres. As a result of this attraction moths only lay eggs in garments made of natural materials. Case bearing clothes moth probably evolved in association with bird or animal nests. There are only two types of moth larvae that have the ability to digest the fibers that clothing is made from. Moths dont eat clothes.
A female moth flutters about and finds a spot suitable to lay eggs. The two species prefer slightly different habitats in the home. Essentially these are the same as the natural fibres they consumed before then the insect with expensive taste. Moth larvae have a fairly specific diet and so female moths typically pick clothes made from animal fibers such as silk wool cashmere angora or fur materials that contain keratin.
When those eggs hatch the larvae or caterpillars of the moths devour clothing. They do not eat cotton and do not eat man made fibres. Some will even attack man made fibres. Rather confusingly most of these moth species will sometimes switch from carpets to clothes and chew any natural fabrics like cotton wool and silk.
When man came along the larvae began feeding on the fibres in their clothes. They hatch within a few weeks of being laid.