The best sign your compression socks are working is a boring one

You pull on a fresh pair in the morning. They're snug. You notice them at the kettle, again on the walk to the car, and maybe once more around mid-morning. Then you forget about them. Late in the afternoon you're halfway round the supermarket when it hits you: your legs aren't doing the thing they usually do by now.

That's it. That's the sign. No fanfare, no dramatic before and after. Just a long day that ends without your legs making a fuss about it.

Which is great, but it also makes "are they actually working?" a fair question. When the evidence is something you don't notice, it's easy to miss.

What working actually feels like

Compression doesn't announce itself. Graduated compression is firmest at the ankle and eases off up the calf, supporting healthy circulation while you're on your feet. Many people find it helps with tired, heavy legs, and that tends to show up in the back half of the day, when your legs would normally be at their worst.

So don't judge them at 9am. Judge them at 5pm. Things people tend to notice:

• The late-afternoon heaviness is lighter than usual, or turns up later.
• Sitting down at the end of the day feels like a rest, not a collapse.
• You think about your legs less as the day goes on, not more.

Sometimes the clearest proof is the day you forget to wear them.

Snug is normal. Some things aren't.

The first few wears feel different from an ordinary sock, and that's expected. Firm around the ankle, a bit of effort to get on, and a faint imprint of the knit when you take them off that fades soon after. That's compression doing its job.

A few things aren't part of the deal. Numbness, tingling, pins and needles, pain, or deep marks that are still there long after the socks are off all mean it's time to take them off. Usually it's a fit problem (wrong size, or a cuff that's rolled down into a tight band), and our fit guide covers that. If those feelings carry on once the socks are off, or only show up in one leg, that's a conversation for your doctor.

Give them a week, not a day

One day tells you very little. Every day is different. One day you're on your feet for nine hours, the next it's 35 degrees, the next you had a big salty dinner the night before. Any of those can make a good pair feel like it did nothing, or an ordinary day feel easy.

So give them a fair trial: a normal week of your usual long days, then think back on how the ends of those days felt compared with a week without them. That's a far better read than one Tuesday.

Why we judge ours at hour twelve

The late-afternoon test isn't just a handy tip. It's how we judge our own socks.

Dr. Woof was started by a family of doctors, and every design has to pass what we call the twelve-hour shift test: worn through full shifts on hard hospital floors. If it doesn't hold up at hour twelve, it doesn't ship.

Hour two is easy for any sock. The end of the shift is where you find out what it's made of.

Your long day might be eight hours on a shop floor or a full travel day door to door. Either way, the pair on your legs has already been held to a longer, harder standard than the one you're asking of it. So if a pair isn't pulling its weight late in your day, the cause is usually something you can fix: the size, or the age of the pair.

When it used to work and doesn't any more

If a pair felt great a few months ago and your legs now end the day the way they did before you owned it, the sock has probably done its time. Compression socks are a consumable. The elastane that holds the gradient relaxes with every wear and wash, and it fades well before a hole ever appears. A pair that slides on too easily or won't keep its cuff up is a pair to retire.

Legs change too, so it's worth measuring your calf again before you restock. And a few pairs in rotation will hold their fit longer than one pair worn every day.

Next, we'll look at exactly how a compression sock wears out, and the signs most people miss until their legs point them out.

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