Why do ankle socks slip off your heel? (And how to stop it)

You're halfway to the shops and there it is: your sock has crept down under your heel and bunched up in the toe of your shoe. It's one of the most annoying small problems in everyday life, and it's almost always fixable.

Here are the five usual causes, and what to do about each.

1. The sock is too short for your shoe

This is the most common culprit, especially with no-show socks. A no-show is designed to sit below the shoe line so you can't see it, which also means there's very little fabric gripping the back of your heel. Every step, the heel of your shoe drags it down a bit more.

Fix: go up a height. A proper ankle sock sits at or just above the ankle bone with a cuff that holds your heel. It's still low and tidy in trainers, but it's got something to hang on to. Our crew vs ankle socks guide explains the heights in more detail.

2. The size is wrong

• Too big: the heel pocket sits under your foot instead of around your heel, so there's nothing to anchor it.
• Too small: the sock is stretched tight and gets pulled down by your heel with every step.

Fix: check where the heel of the sock sits. It should cup the back of your heel exactly, not sit above or below it.

3. The elastic is worn out

Old socks lose their stretch. Once the cuff goes loose, even a well-fitting sock will creep down.

Fix: retire tired pairs, and look after new ones so they last. Hot washes and the tumble dryer are the biggest elastic killers. Our bamboo sock washing guide covers the simple routine: cold wash, no softener, line dry.

4. Your shoes are working against you

Some shoes grab at socks more than others:

• A stiff or rough heel counter (the back of the shoe) rubs the sock down with each step.
• Shoes that are a bit loose let your heel lift, and the sock gets dragged with it.
• Slip-on shoes and loafers often have low backs that catch the top of the sock.

Fix: if one particular pair of shoes always eats your socks, try a slightly taller sock with those shoes, or lace them more firmly so your heel doesn't lift.

5. Slippery or damp feet

A sweaty foot slides around inside a sock, and that movement travels up to the cuff. Some sock fabrics also have a slick finish that doesn't grip skin well.

Fix: choose a breathable, moisture-wicking fibre. Bamboo is soft and absorbent, so it sits more naturally against your skin. If your feet sweat a lot, see our guide to the best socks for sweaty feet.

Why it matters (beyond being annoying)

A sock that slips leaves the back of your heel against the shoe with no protection. That's exactly where blisters start. If you've been getting heel blisters, a slipping sock is a likely cause. More on that in how to stop socks giving you blisters.

What to look for in an ankle sock that stays put

• Sits at or just above the ankle bone, not hidden below the shoe line
• A heel pocket that cups your heel
• A cuff with some stretch that holds without digging in
• Breathable, moisture-wicking fibre
• The right size for your foot

We named ours the Ankle Hugger for a reason. It's a low-cut bamboo sock that sits just above your shoe, in four colours. And if it's not the most comfortable pair you own, the 30-day comfort guarantee has you covered.