The message usually arrives about three days after the parcel, and it is almost never about size. It is this one: he has had it on since breakfast and it is now nine at night — is that too long?
I cut and sew these in Prague, so wearing time is what I get asked about more than anything except the tape measure. Here is the honest answer: how long it stays on, when it comes off, what to watch instead of a thermometer, and how I wash mine. One thing first — I am a maker, not a vet. Nothing here is health advice; anything about your dog's skin, breathing, age or condition belongs with your vet.
The short answer
A jumper is a layer, and a layer belongs to a situation rather than to a day. It goes on for the cold walk, the wait outside the shop, the draughty back room, and comes off when that situation ends. In practice: a few hours at a stretch, more than once a day — not one unbroken run from breakfast to bedtime.
What I would avoid is the opposite of a rule about hours: leaving the same jumper on for days without taking it off. Not because of a number, but because while it is on, nobody is looking underneath it.
A jumper goes on for a situation and comes off when the situation does.
What a day in a jumper actually looks like
The table I would write out for someone asking me in the workshop — the garment and the circumstances, nothing beyond that.
| Moment | Jumper | Why |
|---|---|---|
| Cold, dry morning walk | On | The job it was cut for. |
| Straight back into a heated flat | Off | The room now does the work the jumper was doing. |
| Standing about — a café table, a queue | On | Standing still is where a layer earns its place. |
| Running hard, playing with other dogs | Off | A working dog makes his own heat, and another dog's teeth find a hood. |
| Rain or wet snow | Off once it is wet through | Mine are not rainwear. Sodden fabric is worse than none. |
| Asleep in a heated room | Off | The question I get most — see below. |
Should dogs wear jumpers indoors?
In a heated flat, usually not. The jumper and the radiator are doing the same job, and only one of them is strapped to the dog. When he comes in from the cold the jumper has finished its shift — take it off with the lead and the harness, in one movement, and it becomes a habit you never have to remember.
The exception is worth naming. If your home is genuinely cold, a jumper indoors is sensible on the same terms as outdoors — on for the cold part of the day, off at some point. But a dog who seems cold in a room you find warm is not a question a jumper answers. That one is for your vet.
Can my dog sleep in a jumper? And overnight?
I do not design mine as sleepwear and would not sell one as pyjamas. A dog asleep in a heated room is usually as warm as he will be all day; the layer has nothing left to add. So the default is no — take it off at bedtime.
People still ask whether it is safe overnight, which is fair. What I would want to be true first, all of it about the garment:
- It fits. Loose is the problem here, not snug — slack is what gets caught, or worked halfway off in the night.
- It comes off in the morning, not at the weekend.
- Long-coated dogs get the worst of it: flattened coat under the arms, tangles where the seams sit.
- If anything under it looks wrong when it comes off, ring your vet. Not me.
What temperature should I put a jumper on my dog? I am not giving you a number
Numbers circulate on this. I have no way to check any of them against your dog, and inventing one so this page looks authoritative would be the worst thing I could do to you. It depends on the dog, the coat, the wind, the wet, whether he is moving — and on his age and condition, which are a conversation with your vet.
So I dress for the outing, not the forecast. Four questions: moving or standing still, wet or dry, how long you are out, how much coat he has. Two of the four pointing at cold is enough for me. Then watch him for five minutes, because the dog is a better instrument than the thermometer.
Are dog jumpers cruel?
No. And I am not going to soften that with a paragraph about how much dogs love fashion, because that is not the answer either.
A jumper is fabric cut to a dog's measurements; in itself it is neither kind nor cruel. What can be cruel is the use: too tight, never taken off, left on a dog visibly working to get out of it, put on for a photograph and forgotten. Each of those is a person problem wearing a garment's clothes.
The version I take seriously is the quiet one — is it cruel to dress a dog who does not want to be dressed? There, yes, and the answer is not a better jumper. If he ducks, freezes or goes stiff every time it appears, he has told you.
Why does my dog hate his jumper?
Three reasons come up over and over, and "he hates clothes" is not one of them.
- The way it goes on. Mine pull over the head, and a hand coming down over a dog's face is a big ask. Slow down and let him put his own head through.
- The fit. Tight across the chest or catching in the armpit and he walks like a cat in socks. A dog moving strangely is filing a fitting report, not an opinion on clothing.
- The association. If it only appears before the cold wet walk, then the jumper is the cold wet walk.
If he is unconvinced rather than frightened: put it on indoors for two minutes, do nothing, take it off, feed him. A week of that is a fair trial.
Do dog jumpers actually work?
Within their limits, yes — and the limits matter, because "keeps your dog warm" is an advertising sentence rather than a mechanical one.
A jumper does not make heat. It slows the loss of the heat the dog is already making, across the part it covers: back, ribs, chest, the tops of the front legs. Nothing for ears, feet, tail or the belly below the hem. And it works dry — once soaked through it has stopped helping and started costing.
Take it off now, without thinking about it
- Panting that started after the jumper went on, indoors, with the dog at rest.
- The dog working at it — rubbing along the sofa, pulling at the hem, reversing out of it.
- Wet through.
- Before hard play, and before he meets a dog he is going to wrestle with.
- Anything snagged or wrapped: a hem on a branch, a paw through the wrong opening.
- Anything you find on the skin or in the coat when it comes off. Off first, then your vet — not me.
Washing: what I do with mine
Nobody looks this up until the first muddy walk, and then everybody does. What I do with my own: inside out, mesh laundry bag, cool wash on the gentle cycle, no fabric softener, no tumble dryer, dried flat rather than over a radiator. Inside out is the part that matters: the name is stitched, and stitching keeps its edge better away from the drum.
How often? Straight after a muddy walk, while it is still worth saving; otherwise when it starts to smell — in a normal winter week here, about once. If it is part of the daily routine, a second one is what lets you wash the first without a gap.
Fit decides how long it can stay on
All of it assumes the jumper fits. One that fits is worn through a whole cold walk and forgotten about; one that does not, you will be taking off inside ten minutes — and you should be.
Chest girth decides it: the tape round the widest part of the ribcage, right behind the front legs. My chart runs from S at a 36 cm chest to 5XL at 96 cm, and every figure is a measurement of the dog, not of the garment. Long-bodied dogs can have M through 2XL made with an extra 7 to 10 cm of back.
The chart is on the dog hoodie size guide; where the tape goes is in how to measure a dog for a jumper. For a neck instead of a chest, dog bandana size by breed; if it is going under a tree, a Christmas present for the dog. And if you are stuck on the wording, forty lines that get read.
Questions people ask
How long can a dog wear a jumper?
As long as the cold situation lasts, then off — a few hours at a stretch, more than once a day, rather than days on end without removing it.
Can my dog sleep in a jumper?
In a heated room he does not need one; my default is off at bedtime. If you do leave it on, it must fit without slack, and it comes off in the morning.
Should dogs wear jumpers indoors?
Usually not in a heated home — take it off when the lead comes off. In a genuinely cold room it can make sense.
Are dog jumpers cruel?
No. One that fits, worn for a reason and taken off afterwards, is not cruel — the use can be. If your dog refuses every time, stop; do not buy a better one.
Do dog jumpers keep dogs warm?
A jumper does not make heat; it slows the loss of the dog's own over the back, ribs and chest, and stops helping once soaked through.
How do I wash a dog jumper?
Inside out, in a mesh bag, cool wash on a gentle cycle, no softener, no tumble dryer, dried flat — straight after a muddy walk, otherwise when it starts to smell.
Eleven colours, S to 5XL, cut and sewn in Prague after you order — with your dog's name stitched into it.
See the jumpers