The damage you do not see coming
Clothes moths do their worst work quietly. You do not notice them the way you notice a stain or a snag. You reach for a favorite wool coat in October and find a small, clean hole near the hem, then another along the sleeve. By then the moths that caused it are usually long gone, and what is left is the plain math of a garment you loved and cannot replace at the price you paid for it. Learning how to protect clothes from moths is less about panic and more about a few calm habits that the most organized closets already run on.
What moths are actually after
It helps to know your opponent. The holes are not made by the fluttering adult moths, which do not even eat. The damage comes from their larvae, and what they crave is a protein called keratin. That is why they gravitate to animal fibers: wool, cashmere, silk, mohair, angora, even the felt inside a good hat. They are drawn further in by traces of sweat, skin, and food, which is why a sweater worn once and folded away unwashed is far more inviting than a clean one. Synthetics are usually safe, but a cotton blend with a little wool in it is fair game.
Cedar versus mothballs
For a century, the default answer was mothballs. They work, in the narrow sense that the fumes are toxic enough to kill larvae in a sealed space. The problem is everything else. Those fumes are made of paradichlorobenzene or naphthalene, chemicals you would rather not have soaking into your cashmere or filling the room your clothes live in. The smell clings to fabric long after the box is gone, and it is nearly impossible to fully remove. Consider the real cost of the cheap fix: a jar of mothballs is a few dollars, but the wool sweater it perfumes is not, and the health tradeoff is steep.
Cedar takes a gentler route. Aromatic red cedar carries natural oils that give off a scent moths dislike and that helps deter larvae from settling in. It will not fumigate an active infestation the way a poison does, so cedar is a preventive tool rather than a rescue one. Used the way organized people use it, as a standing habit rather than an emergency, it keeps the problem from starting in the first place. And it leaves your closet smelling like a cabin instead of a chemistry set.
How to use cedar so it actually works
The mistake most people make is scattering a few cedar pieces and assuming the job is done. Cedar works by concentration, so it belongs in enclosed spaces where the aroma can build: a closed drawer, a garment bag, a lidded bin. A set like the Cedar Blocks & Rings — 12-Piece Set gives you enough to distribute properly, with rings that slip over a rod near your most vulnerable knits and blocks that tuck between folded sweaters. One good, well-placed set does more than ten thin sachets spread too far apart.
Do not forget your shoes. Leather and the wool felt inside quality footwear are just as appetizing to larvae, and closed shoe boxes are exactly the dark, still spaces moths look for. A pair of Cedar Shoe Trees — Pair earns its keep twice over: the cedar deters pests while the form draws out moisture and holds the shape of the shoe, which is what people who keep their footwear for a decade rely on.
Keeping cedar alive
Cedar is not permanent, but it is renewable, which is part of what makes it worth choosing. Over several months the surface oils fade and the scent goes faint. That does not mean the block is spent. A light pass with fine sandpaper opens fresh wood and brings the aroma right back, and you can repeat that for years before a piece is truly done. A few drops of cedar oil will revive rings and blocks between sandings. This is the rare closet upgrade you buy once and maintain, rather than replace on a schedule.
Protecting wool and cashmere the right way
Cedar is one layer. The other is preparation, and it matters most for your finest pieces. Always clean wool and cashmere before you store them, because it is the invisible residue of a season of wear, not the fiber alone, that draws larvae in. Store knits folded rather than hung so they hold their shape, ideally in a breathable bin with cedar tucked alongside. For long off-season storage, sealed Vacuum Storage Bags — Set of 8 add a physical barrier no moth can cross, and a cedar block inside covers you for the day you open the bag again. If you are the kind of person who invests in good natural fibers, this is simply the upkeep that keeps them yours.
None of this takes much. Clean before storing, keep cedar in the enclosed spaces that matter, refresh it a couple of times a year, and the small holes that ruin good clothes never get their chance to start.