Yes, a dog cooling shirt can help, but only within limits. A wet cooling shirt draws heat away as the water evaporates, and the best study we found showed working dogs in an evaporative vest finished a hot-weather run about 0.6°C (1.1°F) cooler than without one.5 It works best in dry heat and less well in sticky humidity. It's a comfort tool that sits alongside shade, water and smart walk times. It doesn't replace them.
Key takeaways
- Dogs cool themselves mainly by panting. Sweat glands on their paw pads do very little.1,2
- Evaporative cooling garments have some research behind them, mostly small studies in working dogs. The results are encouraging but modest.5,6,7
- Evaporation slows as humidity rises, so a cooling shirt does more on a dry Perth or Adelaide afternoon than on a muggy Brisbane or Darwin one.4,8
- Flat-faced breeds, heavier dogs and older dogs are at higher risk of heat-related illness.9,11
- Heatstroke is an emergency. Cool your dog with water and get to a vet straight away. A cooling shirt is not first aid.11,12
How do dogs cool themselves down?
Dogs don't sweat the way we do. Cornell's vet school puts it simply: dogs only have sweat glands on their paws, so they rely on panting to cool down.1 Those paw-pad glands switch on when a dog gets hot, but panting does most of the work, as moisture evaporates from the tongue, nose and airways.2 Dogs also widen the blood vessels near the skin, especially around the ears and face, so heat can escape.2
There's a catch. Panting is itself evaporative cooling, and it's much less effective on hot, humid days.3 On a steamy afternoon your dog is working harder for less relief.
How does a dog cooling shirt work?
It's the same physics as a backyard evaporative air cooler. Water absorbs heat as it evaporates, and that heat comes from whatever the water is sitting on: in this case, the shirt and your dog's coat and skin. The Queensland Government's housing advice describes evaporative coolers as cooling air through the evaporation of water, and notes they become less effective as humidity increases.4
A cooling shirt is a lightweight, breathable layer that holds water against the body and lets air move through it. Soak it, wring it out, put it on, and it keeps cooling until it dries. Then you re-wet it.
Do cooling vests for dogs actually work? What the research says
We searched PubMed and Europe PMC for studies on cooling vests and coats in dogs. There aren't many, and none look at pet dogs in everyday clothes. Here's what exists.
The strongest study: military working dogs in Spain
In a 2022 study published in Animals, researchers ran 13 German Shepherds and Belgian Malinois through a 20-minute training run in Valencia in August, at 27.8–31°C (82–88°F) and 46–53% relative humidity.5 Each dog did the run three times: with no vest, with a vest using chilled phase-change pads, and with a three-layer evaporative vest that's soaked in water before use.5
- With no vest, average core temperature at the finish line was 41.22°C (106.2°F). With the evaporative vest it was 40.59°C (105.1°F), roughly 0.6°C (1.1°F) lower.5
- Fifteen minutes later the gap had widened to about 0.8°C (1.4°F) (40.59°C (105.1°F) versus 39.82°C (103.7°F)).5
- The evaporative vest beat the chilled-pad vest, whose difference from no vest wasn't statistically significant.5
That's a meaningful result, but read the fine print. It was 13 fit working dogs, one location and one type of exercise, and the authors name the small sample as a main limitation.5 Notice too that the dogs still reached temperatures above 40°C (104°F) with a vest on. The vest helped. It didn't make hard exercise in the heat safe.
Other evidence
A small University of Florida study of seven working dogs found cooling vests helped some of them cool down faster after intense summer exercise, and the researchers recommended more data on cooling vests.6 A 2026 review of dog-worn equipment describes the evidence as showing body temperatures slightly lower in dogs wearing cooling vests, and notes that no one has yet studied whether cooling vests affect gait.7
The honest verdict: evaporative cooling garments have modest, real benefits in the small studies that exist, mostly in working dogs in fairly dry heat. Nobody has trialled everyday cooling shirts on pet Frenchies in Brisbane, and we won't pretend otherwise.
Dry heat vs humidity: where in Australia does a cooling shirt work best?
Because evaporation slows as the air fills with moisture, the climate you live in matters a lot.4 Look at Bureau of Meteorology long-term January averages:8
| City (BOM station) | January mean max | January mean 3pm humidity | What to expect from a cooling shirt |
|---|---|---|---|
| Perth (Airport) | 31.9°C (89.4°F) | 37% | Works well. Dries faster, so re-wet more often |
| Adelaide (Kent Town) | 29.6°C (85.3°F) | 36% | Works well. Dries faster, so re-wet more often |
| Brisbane (Aero) | 29.2°C (84.6°F) | 63% | Helps, but more gently |
| Darwin (Airport) | 31.8°C (89.2°F) | 70% | Limited effect on humid days |
Similar maximums, very different air. In Perth and Adelaide's dry summer heat a damp shirt has plenty of room to evaporate. In Brisbane and Darwin humidity, it evaporates more slowly, so the cooling is gentler. Your dog's panting is struggling in the same conditions.3 That's exactly when shade, airflow, water and staying inside matter most.
Being from Brisbane ourselves, we'll say it plainly: on a sticky 33°C (91°F) afternoon with a storm brewing, the best cooling product is your air-conditioned lounge room.
How to use a dog cooling shirt, step by step
- Soak it. Fully submerge the shirt in cool tap water until it's saturated.
- Wring it well. You want it damp, not dripping. Excess water just runs off and wets the floor.
- Put it on. It should sit close to the body so the damp fabric is near the skin. Use the size finder if you're between sizes.
- Head for shade. Air moving across the shirt speeds up evaporation, so a breezy shady spot or a fan helps.
- Re-wet when it's drying out. Once the fabric feels mostly dry, the cooling has stopped. In dry heat that happens faster, so carry a water bottle on walks.
- Take it off when you're done. Once your dog is inside in the air-conditioning, or the hot part of the day has passed, the job is done. Hang it to dry.
- Keep an eye on your dog. A cooling shirt can make a dog more comfortable. It can't tell you when they're getting into trouble, so keep watching for heavy panting and the warning signs below.
Wash it like any other dog garment. Our guide to washing dog clothing covers the basics.
Soak, wring, wear
Our breathable mesh cooling shirts come in sizes XS–XXL with bold prints, from ice creams to love hearts. Ships next business day from Brisbane.
Which dogs benefit most from cooling shirts?
Every dog can overheat, but some are at much higher risk. A large UK study of over 900,000 dogs under vet care found:9
- Flat-faced (brachycephalic) breeds had about twice the odds of heat-related illness compared with medium-muzzled dogs. Compared with Labradors, Bulldogs had about 14 times the odds, French Bulldogs about 6.5 times and Pugs about 3 times.9
- Heavier dogs: dogs at or above the average weight for their breed and sex had higher odds than lighter dogs.9
- Older dogs: dogs aged 12 and over had the highest odds of any age group.9
- Thick coats: the study couldn't test coat type directly, but the authors suggested it may matter, pointing to thick-coated breeds such as the Chow Chow and Golden Retriever.9
RSPCA Australia lists the same risk groups: flat-faced breeds, obesity, thick or long coats, very young or old dogs, and dogs with breathing or heart problems.10 RSPCA Australia also notes overweight dogs overheat faster and have a limited capacity for cooling.11
If you have a Frenchie, Pug or Bulldog, a cooling shirt is a useful extra layer of comfort, but their routine needs more care overall. We've written a whole guide on how to keep a French Bulldog cool in summer.
Cooling shirt vs cooling vest vs cooling mat
| Cooling shirt | Cooling vest | Cooling mat | |
|---|---|---|---|
| How it works | Light mesh holds water; cools as it evaporates | Usually thicker layered fabric (evaporative), or chilled pads | Your dog lies on a cool surface |
| Best for | Short walks, backyard time, everyday outings | Working and sporting dogs, longer exertion | Resting at home |
| Weak spot | Needs re-wetting; gentler in humidity | Bulkier; evaporative types also slow in humidity | Only works while the dog lies on it |
The research above was on vests, not shirts. In the Spanish study, the vest that cooled by evaporation did better than the one with chilled pads.5 A shirt uses the same evaporative principle in a lighter, everyday form. Many owners use more than one: a shirt for the morning walk, a mat in the shade at home.
When a cooling shirt is not enough: heatstroke signs
No shirt prevents heatstroke. In the UK study, around 14% of recorded heat-related illness events were fatal.9 Know the signs. RSPCA Australia lists:10
- Relentless panting that gets worse, drooling, agitation or restlessness
- Very red or pale gums, a bright red tongue, increased heart rate, breathing distress
- Vomiting or diarrhoea, confusion, dizziness or staggering, weakness
- Muscle tremors, seizures, collapse
What to do
- Cool first, transport second. RSPCA UK advises cooling your dog straight away, and calling the vet on the way.12
- Use water and moving air. RSPCA Australia advises applying room-temperature or cool water to the fur or skin, with a fan or air-conditioning.11 RSPCA Queensland advises against ice-cold water.15
- Don't cover your dog. RSPCA UK warns that damp towels placed over a dog can trap heat and make things worse.12 Yet a UK study found wet towels were the most common cooling method owners used.14 Don't rely on a cooling shirt here either. Take it off so water and air reach the coat and skin directly.
- Get to a vet immediately, even if your dog seems to improve.1,11
One more reason not to wait: in UK canicross dogs, body temperature kept rising in the first five minutes after exercise stopped in about a quarter of cases.13 A hot dog doesn't always cool down just because the walk is over.
How to keep dogs cool in summer in Australia: a daily routine
- Early morning: walk at sunrise, when it's coolest.15 Check the ground with your hand. RSPCA Australia warns even grass and bare ground can be unsafe in sunny, dry spots.11
- Before heading out: soak and wring the cooling shirt, and pack water for both of you.
- Middle of the day: indoors, or in a cool, shaded, well-ventilated spot with plenty of water and a spare bowl in case one gets knocked over.10 Skip exercise in hot, humid conditions.10
- Afternoon outdoor time: shirt on and re-wet as it dries, shade, and short sessions only.
- Evening: walk at sunset once the footpath has cooled.15
- Always: never leave your dog in a car, not even with the windows down on an overcast day.11
Out in the sun at the beach or pool? A cooling shirt is about heat, not sun protection. For time in the water, a UPF 50 dog rash shirt helps reduce UV exposure.
FAQs
Do dog cooling shirts really work?
They can help. The best study found working dogs in an evaporative vest finished a hot run about 0.6°C (1.1°F) cooler than without one.5 The research is small, and the effect is modest, so treat a cooling shirt as an add-on to shade, water and good timing.
Do cooling shirts work in humidity?
Less well. Evaporative cooling becomes less effective as humidity rises.4 In Brisbane or Darwin humidity a shirt will still help a little, but staying in the shade or air-conditioning matters more.
How long does a dog cooling shirt stay cool?
Only as long as it stays damp, which depends on heat, humidity and wind. In dry, breezy weather it dries quickly. Re-wet it when the fabric feels mostly dry.
Can my dog wear a cooling shirt all day?
It's best for the hot parts of the day when your dog is outside. Once your dog is indoors in air-conditioning, take it off and let it dry. Always keep an eye on your dog while they wear it.
Should I put a wet towel on an overheated dog?
Not over the top of them. RSPCA UK says damp towels placed over a dog can trap heat.12 Use cool water and moving air, then get to a vet immediately.11,12
Is a cooling shirt good for French Bulldogs?
It can make a Frenchie more comfortable on warm days. But French Bulldogs had about 6.5 times the odds of heat-related illness compared with Labradors in a large UK study,9 so they need extra-careful heat management overall.
References
- Cornell University College of Veterinary Medicine, Riney Canine Health Center. Heatstroke: A medical emergency.
- American Kennel Club. Do Dogs Sweat?
- The Animal Medical Center (New York). Heatstroke in Dogs: How to Recognize It and What to Do Next.
- Queensland Government. Evaporative air coolers.
- Benito M, Lozano D, Miró F (2022). Clinical evaluation of exercise-induced physiological changes in military working dogs (MWDs) resulting from the use or non-use of cooling vests during training in moderately hot environments. Animals 12(18):2347.
- University of Florida College of Veterinary Medicine. UF study looks at role of vests in heat-related illness of working dogs.
- Ridgway M (2026). Health implications of dog-worn equipment: a review of known and alleged physical risks. Frontiers in Veterinary Science 13:1711781.
- Bureau of Meteorology. Climate statistics for Australian locations: Perth Airport, Adelaide (Kent Town), Brisbane Aero, Darwin Airport.
- Hall EJ, Carter AJ, O'Neill DG (2020). Incidence and risk factors for heat-related illness (heatstroke) in UK dogs under primary veterinary care in 2016. Scientific Reports 10:9128.
- RSPCA Australia. Warm weather worries: protect pets from heatstroke.
- RSPCA Knowledgebase. How can I protect my dog from heatstroke?
- RSPCA (UK). How to recognise and treat heatstroke in dogs.
- Carter AJ, Hall EJ, Bradbury J, et al. (2024). Post-exercise management of exertional hyperthermia in dogs participating in dog sport (canicross) events in the UK. Journal of Thermal Biology 121:103827.
- Hall EJ, Carter AJ, Bradbury J, et al. (2023). Cooling methods used to manage heat-related illness in dogs presented to primary care veterinary practices during 2016–2018 in the UK. Veterinary Sciences 10(7):465.
- RSPCA Queensland. Heatstroke and your pet.