The female moth lays her tiny eggs among the threads, pile of a fabric, fur, lint, or other debris in undisturbed places. In summer they hatch in a few days, but in winter they may require a month or more.
The caterpillar of the Webbing clothes moth spins distinctive silken feeding tunnels that sometimes look rather patchy. When full-grown, it spins a pupal case and attaches bits of fibre and excrement to the outside. It is well hidden in the fabric attacked. When infested material is disturbed, it runs about on the surface of the fabric or fur. Evidence of infestation can also include cast skins of larvae, silky webbing over the furs, or fabrics, and grey pellet-like frass below the fabric, furs, or taxidermy mounts.