Can moths destroy clothes or carpets?

The single most useful fact on this page is also the one most people get backwards: adult clothes moths do not feed on fabric. They have no functional feeding mouthparts for it. All of the actual damage — the holes, the thinning, the silk webbing or cases — is done by the larval stage, which lives in dark, undisturbed spots specifically to avoid being seen: the back of a folded sweater, the underside of a wool rug, deep inside a stored fur coat.

That means seeing an adult moth flutter out of a closet isn't the alarm bell people treat it as — it's a sign that larvae have already been present nearby, developing where you weren't looking. By the time you notice the adult, the feeding that matters has usually been going on for a while.

Clothes-moth larvae carry gut bacteria that secrete keratinases — enzymes capable of digesting keratin, the structural protein that makes up wool, hair, fur, feathers, and silk. That's a genuinely unusual digestive trick; most household fabric pests can't break down this protein at all, which is why cotton and synthetic fibers are largely spared. Where keratin is present and undisturbed, per university entomology and textile-conservation sources, the resulting damage can be serious and, once fiber is eaten, irreversible for that item.

Most of this hub exists to correct an overstated pest-damage claim. This page is the exception: the ordinary warning about clothes moths ruining wool is essentially accurate, and if anything the public conversation understates it, because it fixates on the visible adult rather than the hidden larvae actually responsible. It's also worth naming the frequent co-conspirator: carpet beetles (Anthrenus, Attagenus) cause nearly identical keratin damage through the same adults-don't-feed, larvae-do-the-work pattern, and are often the true culprit behind damage blamed on 'moths.'

Because larvae need dark, undisturbed conditions to feed successfully, the fix is mostly about denying them that: clean fabric before long-term storage, use sealed containers rather than open shelving, and periodically air out and inspect anything stored for months at a time. Heat and cold both work reliably — a documented oven treatment or a home freezer, held long enough, kills every life stage. What doesn't help is treating this as a spray-and-forget problem or assuming a single vacuum pass solves an established infestation in a rug or closet full of wool.