Why Merino Wool Socks Outperform Cotton

Smelly Socks? Here's Why Merino Beats Cotton Every Time

Whether you’re on your feet all day, hiking a trail, or just walking around town, cotton often can’t keep up.

That’s because cotton socks, while cheap and familiar, aren’t built for performance, or comfort in the long run. Merino wool, on the other hand, has quietly become the go-to choice on UGG stores for people who’ve had enough of soggy soles and sweaty arches.

After years of testing gear, talking to hikers and everyday wearers alike, and seeing the difference first-hand, here’s what I can tell you: once you switch to merino, you won’t want to go back.

In this article, you’ll learn exactly why merino wool socks outperform cotton, from how they regulate temperature to why they don’t stink after a long day. And more importantly, you’ll see whether they’re worth the switch for you.

The Science of Fibres: Merino vs Cotton

To really understand why merino outperforms cotton, you’ve got to look at the fibres themselves, because not all materials are built the same.

Cotton is a plant-based fibre. It’s breathable, sure, but it holds onto moisture like a sponge. Once your feet start sweating, cotton soaks it all up… and keeps it there. That dampness creates the perfect conditions for blisters, bacteria, and odour. Not ideal if you're on your feet for hours or moving between different temperatures.

Merino wool, on the other hand, comes from Merino sheep, a breed known for their incredibly fine, soft wool in UGGs. These sheep live in harsh climates, and their wool is designed to handle extremes. That’s why merino has natural temperature-regulating and moisture-wicking properties.

Here’s what makes merino different:

• It pulls moisture away from your skin and releases it into the air, keeping your feet dry even if you’re sweating.

• It insulates when wet, so you won’t get that cold, clammy feeling cotton gives you.

• It’s naturally breathable, so it keeps your feet warm in winter and cool in summer.

• It’s soft, not itchy like traditional wool, thanks to its fine fibres.

In short, cotton might feel okay when you first put it on, but merino adapts to your body and environment. It works with your feet, not against them.

How Merino Socks Perform in Real Life

It’s one thing to talk about fibres, but what really matters is how socks feel and perform when you’re actually wearing them. Whether you're hiking up a trail, walking to work, or just doing the school run, merino socks prove their value where cotton falls short.

Long Days on Your Feet? No Problem.

Merino wool shines when you're on the move. Unlike cotton, which stays damp once you start sweating, merino keeps pulling moisture away from your skin throughout the day. That means fewer blisters, less chafing, and no soggy discomfort after hours of wear.

Hot or Cold? Merino Doesn’t Care.

One of the biggest surprises for most people is how well merino regulates temperature. In cold weather, the wool traps warm air close to your skin, keeping your feet toasty. But in hot weather, it releases heat and breathes naturally — so your feet don’t overheat. Cotton? It’ll just sit there, getting soggier with every step.

Great for Travel, Hiking, or Everyday Life

Whether you’re packing light for a trip, heading out for a multi-day hike, or just want a sock that keeps your feet happy from 9 to 5, merino delivers. In fact, many travellers swear by merino because they can wear the same pair for days without any smell — more on that in the next section.

Bottom line: Merino socks feel better, perform better, and hold up under pressure — whether you're pounding the pavement or lounging at home.

Odour, Hygiene & Maintenance: The Underrated Superpowers of Merino

Let’s talk about something no one wants to admit out loud: smelly feet.

Cotton socks, once they get damp, become the perfect breeding ground for bacteria. That’s where the odour comes from, not your sweat itself, but what happens when it gets trapped. And since cotton holds onto that moisture, it also holds onto the smell.

Merino wool is different. It’s naturally antibacterial and antimicrobial, which means it resists the growth of the bacteria that causes foot odour. Even after a long day, your socks don’t stink. And yes, you really can wear the same pair for a couple of days if you need to, something hikers, travellers, and minimalists love.

Less Washing, Less Hassle

Because merino resists odour and manages moisture so well, you don’t need to wash your socks after every single wear, unlike cotton. That makes them perfect for travel or daily wear when you’re trying to cut down on laundry.

And despite being wool, most merino socks are machine washable. Just avoid high heat and skip the tumble dryer, air drying will help them last longer anyway.

Cleaner Feet, Happier Skin

Thanks to their breathability and moisture-wicking properties, merino socks also help prevent fungal infections like athlete’s foot, which love damp environments. Drier feet = healthier feet.

Comfort, Fit & Sensation: Not Your Grandma’s Wool

If you hear “wool socks” and immediately think of thick, itchy, scratchy winter wear, you’re not alone. But merino wool is a different beast altogether.

Soft, Not Scratchy

Merino wool fibres are incredibly fine — much finer than regular wool. That means they bend easily against the skin, rather than poking or irritating it. The result? A soft, smooth feel that’s comfortable even if you’re wearing them all day long, directly against your skin.

In fact, many people who say they “can’t wear wool” are totally fine with merino — because it doesn't trigger that same scratchy reaction.

Snug Where It Counts, Flexible Where You Need It

Merino socks are often blended with a bit of nylon or elastane for structure and durability, giving you a secure fit without tightness or slippage. You won’t find them bunching up in your shoes or sliding down mid-walk. And because merino naturally stretches and rebounds, it hugs your foot without squeezing it.

All-Day Comfort

Because they regulate temperature so well, merino socks help prevent that clammy, sticky feeling you often get with cotton. Your feet stay at a stable temperature, dry and fresh — which makes a bigger difference than you might think, especially if you’re on your feet all day.

Durability & Value: Are Merino Socks Worth the Price?

Let’s address the elephant in the room: merino socks cost more than cotton. So it’s fair to ask, do they actually last longer? And are they worth it?

Built to Last (When You Treat Them Right)

Good quality merino socks, especially when blended with nylon or other reinforcing fibres, are surprisingly durable. The key is in the construction, tightly woven fibres, reinforced heels and toes, and proper care all make a big difference.

While cotton socks tend to lose shape, wear thin, and develop holes quickly (especially in high-friction areas), merino socks hold their structure longer. They’re less likely to sag, stretch out, or disintegrate after a few washes.

That said, they’re not indestructible, and they don’t like heat. Toss them in a hot dryer or wash them rough, and you’ll reduce their lifespan. But with gentle washing and air drying, a good pair can last you years.

Cost Per Wear: The Real Comparison

Here’s the thing: cotton socks might cost less upfront, but they wear out faster, get smelly quicker, and need to be replaced more often.

When you factor in:

• Fewer washes

• Longer lifespan

• Better comfort

• Versatility across seasons and activities
  ...you’re getting more wear, more value, and more comfort from every dollar spent.

So while the price tag is higher, merino socks often pay for themselves in performance and longevity.

Buying Tips: What to Look for in Merino Socks

Not all merino socks are created equal. If you’re going to invest in a pair, it’s worth knowing what to look for, so you get the comfort and performance you’re paying for.

1. Check the Fibre Content

Look for socks with a high percentage of merino wool, ideally 60% or more. Some socks are labelled as “merino” but only contain a small amount. A higher merino content usually means better temperature regulation and moisture control.

That said, a small blend of nylon, elastane, or polyamide is a good thing. It adds durability, shape retention, and stretch, all without taking away from the merino’s natural benefits.

2. Look for Reinforced Zones

Quality merino socks will have extra padding in the heel and toe areas, where wear and tear happens fastest. This helps the socks last longer and adds cushioning where you need it most.

3. Consider Your Use Case

• For hiking or active wear: Look for medium or heavy cushioning, a snug fit, and moisture-wicking design. Crew-length or higher is best for boots.

• For everyday wear: Lightweight or midweight merino socks work well with trainers or casual shoes.

• For travel: Choose odour-resistant socks that can go a couple of wears between washes, merino excels here.

4. Pay Attention to Construction Quality

Flat seams, smooth toe closures, and tight-knit construction are signs of a well-made sock. Avoid anything that feels rough or poorly finished, it’ll be uncomfortable and won’t last.

5. Buy from a Trusted Brand

Reputable brands will usually offer transparency about materials, ethical sourcing, and performance features. If you're buying online, check reviews — especially from people who’ve worn them for months, not just tried them on once.

Final Verdict: Merino Wool Socks Leave Cotton in the Dust

If your current cotton socks are constantly letting you down, sweaty feet, blisters, bad smells, wearing out too fast, it’s probably time for an upgrade. And when it comes to comfort, performance, and long-term value, merino wool socks are in a league of their own.

They keep your feet dry, regulate temperature naturally, resist odour, and feel good all day long, whether you’re heading into the bush, onto a flight, or just around the block. Sure, they cost a bit more up front. But they’ll save you hassle (and laundry) in the long run.

So, are merino socks worth it? If you value comfort, durability, and healthier feet, absolutely.

If you’re done with damp, uncomfortable socks, it’s time to make the switch. Our Premium Possum and Merino Wool Ribbed Socks at UGG Australia Classic are designed for comfort, warmth, and all-day wear, no matter where life takes you.

Shop UGGs at UGG Australia Classic and give your feet the upgrade they deserve.