Holes in Merino Clothing - The Uninvited Pest Guests

A guided image showing different types of merino holes and where the damage is likely coming from

The Mystery Pest Guests

So, you’ve gone through the Laundry Investigation, you’ve ruled out Wear and Tear, and you’ve checked the Fit and Fabric Weight. But you’re still finding holes. Maybe they are small, clean-cut circles, or maybe you found a "grazed" patch where the fabric looks thin but hasn't quite broken through yet.

It’s time for the investigation that no one really wants to have and why I've delayed on making this post... <creepy factor!>: The Bug Investigation.

I know, I know. Just the thought of "bugs" in the house makes most of us want to scrub every surface. But here is the truth: clothes moths and silverfish aren't looking for a "dirty" house. In fact, they have excellent taste! They are looking for high-quality protein, and your ZQ Merino is the equivalent of a five-star steak dinner to them.

Who are the Culprits?

1. The Clothes Moth It’s actually not the flying moths that eat your clothes—it’s their larvae. They love dark, undisturbed places (like the back of a drawer or closet, or the bottom of a laundry basket). They are particularly attracted to wool that has microscopic traces of "food" on it—think sweat, skin cells, or a tiny drop of milk from breakfast.

2. Silverfish These little guys love starchy things, but they are also known to snack on natural fibers. They tend to hang out in humid areas, so if your gear is stored in a damp basement laundry room or a bathroom cupboard, or the floor of the bathroom from your son that just leaves the clothes there from his shower....they might find their way in.

The Evidence: What to look for

How do you know it's a bug and not a snag?

A photo of merino fabric that has a pest eaten type hole

Above very up close photo showing a small bug related hole. These are small, and circular. Fingernail for reference.

The "Clean" Circle: Unlike a snag (which usually has a frayed edge or a "pull" line), bug holes are often very round and clean, as if they were neatly nipped out.
The Grazing: Sometimes you’ll see a spot where the wool looks "thinned" out. This is where the larvae have been "grazing" on the surface fibers but didn't finish the meal.
The Location: If the holes appear while the clothing has been sitting in a drawer for a few weeks, or if you find them in an area that doesn't get much friction (like the middle of the back), it’s a strong sign of an uninvited guest.

How to Evict the Guests (and Prevent Them!)

Sunny image of merino wool apparel hanging on a clothes line

The Sun Treatment Nature has a built-in pest repellent: Sunshine. If you suspect an item has been visited by bugs, give it a good shake outside and hang it in bright, direct sunlight. Larvae hate the light and the heat!

Wash Before You Store Since bugs are attracted to the "extras" on our clothes (sweat and oils), never put your merino away for the season without a proper wash. Even if it looks clean to the eye, those microscopic skin cells are an invitation for pests.

Air-Tight is Right If you aren't wearing your merino daily, store it in fine mesh bags or, even better, air-tight bins.

Natural Deterrents I’m a big fan of cedar and lavender. They won't necessarily kill an infestation, but they make your drawers much less "homey" for moths. Plus, your clothes will smell amazing.

The Final Say

Finding a hole is frustrating, especially when you've invested in quality gear for your family. But remember—merino is a natural, biodegradable fiber. It’s part of what makes it so amazing for our skin and the planet, but it also means nature sometimes wants to "reclaim" it!

If you've checked off the laundry, the wear, the fit, and the bugs, and you're still stumped—don't lose hope. Most small holes can be easily fixed with a quick "darn" or a patch, and your favorite base layer will be back in action for your next adventure!

The Merino Hole "Field Guide"

Use this guide to look closely at the edges of the hole. Often, the tiny fibers left behind will tell the whole story!

If the hole looks like...	It is likely...	The "Fiber" Clue
A clean-cut circle	Pests (Moths/Silverfish)	No Fuzz. The edges look "neat" and clipped because the larvae have actually eaten the protein fibers.
Multiple tiny "pepper" holes	Laundry Enzymes	Weakened edges. The fabric around the hole feels thin or slightly slimy when wet; the soap has chemically dissolved the wool.
A "grazed" or thinning patch	Pests (Early Stage)	Surface Loss. The base fabric is there, but the "fuzzy" top layer has been scraped away by insects. Could also be Laundry enzymes in the early stage.
A jagged tear with "fuzz"	Friction / Snags	Fuzzy Edges. You will see tiny broken fibers or "fuzz" around the hole where the fabric was physically pulled and snapped.
A "pull" or run in the fabric	Mechanical Snag	The Line. You'll see a horizontal or vertical "line" in the knit where a small part of the fabric was caught and pulled tight.

Why the "Fuzz" Matters

When you are looking at your merino under a bright light, check the edges of the hole. If the edges are fuzzy or frayed, it means the fiber was broken by force (like a zipper or a rough piece of wood). If the edges are perfectly smooth, something has likely made a meal out of that spot!