How to Choose Walking Socks (and Why Cotton Fails)

You can spend a lot on boots and undo most of the benefit with the wrong socks. Socks control moisture, and moisture controls blisters, warmth and odour. Here's how to choose walking socks that actually work.

Why cotton is the wrong choice

Cotton absorbs sweat and holds it against your skin. Wet skin is softer and far more prone to friction damage, which is why cotton socks are behind a large share of blisters. Cotton also loses all insulating value when damp — genuinely dangerous in cold conditions.

Why wool works

Merino wool absorbs moisture into the fibre and releases it as vapour, so your skin stays comparatively dry. It insulates even when damp, regulates temperature in both directions, and resists odour naturally — the same properties that make wool good for sweaty feet in slippers. Modern merino is fine and soft, not the itchy wool of decades past.

Synthetic blends

Polyester, nylon and similar fibres wick moisture along the surface rather than absorbing it, dry very fast and are hard-wearing. They hold odour more than wool. Most good walking socks are a merino-synthetic blend — wool for comfort and odour resistance, synthetic for durability and drying speed.

Thickness: match it to the boot

Thicker isn't warmer if it makes the boot tight — compressed insulation doesn't work and restricted circulation makes feet colder. Choose thickness so the boot still fits properly:

• Thin/liner: warm weather, close-fitting shoes.
• Midweight: the everyday default for walking boots.
• Thick: cold weather — but only if the boot has room, which is why our winter boot guide says to buy with your winter socks on.

Fit and details

Socks should be snug with no wrinkles — a fold of fabric is a blister waiting to happen. Look for a seamless or flat toe seam, a bit of elastic support through the arch, and height above the boot collar so the shaft never rubs bare skin.

The two-sock trick

For long walks or blister-prone feet: a thin liner sock under a thicker one. Friction happens between the two layers instead of against your skin. Combined with the advice in our guide on stopping shoes rubbing, it solves most persistent blister problems.

Frequently asked questions

What are the best socks for hiking boots? Merino wool or a merino-synthetic blend in midweight — they manage moisture, insulate when damp and resist odour. Avoid cotton.

Why shouldn't I wear cotton socks for walking? Cotton holds sweat against the skin, which softens it and dramatically increases blister risk, and it stops insulating when wet.

Do thicker socks make boots warmer? Only if the boot still fits. Overtight socks compress the insulation and restrict circulation, making feet colder.

Boots to wear them with

Browse our waterproof hiking boots, handmade in Estonia.