Yes, moths can and do eat leather. More precisely, it’s the larvae of clothes moths that cause the damage, not the flying adults you might spot near your closet. Leather is an animal-derived material, and clothes moth larvae are capable of digesting the protein fibers it contains. That said, leather isn’t their first choice, and understanding what attracts them can help you protect your jackets, bags, and furniture.
Why Moth Larvae Target Leather
Clothes moth larvae feed exclusively on animal-based fibers. Their digestive systems can break down keratin, a tough structural protein found in wool, fur, silk, feathers, felt, and leather. While wool and fur tend to be their preferred meals, leather is absolutely on the menu.
Larvae are especially drawn to materials carrying traces of sweat, body oils, food residue, or urine. A leather jacket you’ve worn all season without cleaning, with oils accumulated around the collar and pocket edges, is far more attractive to moth larvae than a freshly conditioned piece stored properly. The organic residues act like a dinner bell.
How to Spot Moth Damage on Leather
Two species are responsible for most indoor damage: the webbing clothes moth and the casemaking clothes moth. Each leaves different calling cards.
Webbing clothes moth larvae spin silken tubes that they attach directly to the material they’re eating. If you see fine, web-like threads on your leather goods, that’s a strong indicator. Casemaking clothes moth larvae take a different approach. They build small portable cases from bits of the material they’re consuming and drag these along as they feed. Finding tiny tube-shaped casings on or near leather items points to this species.
The larvae themselves are cream-colored caterpillars, less than half an inch long. The actual feeding damage on leather can appear as surface grazing, thinning, or small irregular holes, depending on how long the infestation has been active. The larval stage lasts roughly 67 days under typical indoor conditions but can stretch to 29 months in less favorable environments, meaning a single generation of larvae can chew away at your belongings for a very long time.
Carpet Beetles Cause Similar Damage
Moths aren’t the only insects that eat leather. Carpet beetle larvae also digest keratin and feed on wool, fur, silk, feathers, and leather. If you’re finding damage but no silken webbing or portable cases, carpet beetles may be the culprit instead.
Carpet beetle larvae are small (roughly an eighth to a quarter inch long) and covered in tiny hairs or bristles. They don’t spin webs or build cases like moth larvae do. Instead, they leave behind shed skins that can look like living larvae at first glance, along with small fecal pellets near feeding sites. Knowing which pest you’re dealing with matters because treatment approaches differ.
Protecting Leather From Moth Damage
The single most effective step is cleaning leather thoroughly before storing it. Wipe down the entire surface with a soft cloth, paying extra attention to the collar, pocket edges, and anywhere skin oils and dirt tend to build up. For deeper cleaning, use a product designed specifically for leather, and always test it on a hidden spot first, like the inside of a pocket or along an inner seam. Apply cleaner to the cloth rather than directly onto the leather, work in gentle circles, and let everything air dry completely at room temperature.
After cleaning, apply a leather conditioner. This replenishes natural oils that keep the material supple and creates a less appealing surface for larvae. Focus on high-stress areas where the leather bends and flexes. Give the conditioner at least 30 minutes to soak in before putting the item away.
For storage, cedar hangers are worth the investment. Cedar naturally repels insects and absorbs excess moisture, creating a less hospitable environment around your leather goods. Cover items with a cotton or canvas garment bag to block dust and pests while still allowing airflow. Never use plastic bags for long-term storage. Plastic traps moisture and creates conditions that encourage both mold and insect activity.
Store leather in a temperature-stable spot, ideally between 60 and 75 degrees Fahrenheit. A bedroom closet on an interior wall works well. Avoid attics, basements, and garages, where temperature swings cause leather to expand and contract repeatedly and where pest pressure tends to be higher. Never fold leather items. Folding creates permanent creases that worsen over time and can crack, giving larvae easier access to inner fibers.
What Makes Leather Lower Risk Than Wool
While moths can eat leather, it’s a tougher material than loose-fiber textiles like wool sweaters or cashmere scarves. The tanning process that transforms raw animal hide into finished leather changes the protein structure and removes much of what makes it easy for larvae to digest. A clean, well-conditioned leather jacket in a breathable garment bag is at relatively low risk compared to a neglected wool coat crammed in the back of a dark closet.
The real danger comes from neglect: storing leather dirty, in dark undisturbed spaces, for long periods. Moth larvae thrive in quiet, dark environments where they can feed undetected for weeks or months. Periodic inspection of stored leather goods, even just pulling them out and giving them a quick look every few months, goes a long way toward catching a problem before it becomes serious damage.