Buying guides
Best Cooling Vest for Dogs: What Actually Matters
The best cooling vest for a dog is an evaporative one that fits snugly, covers the chest and back, and is kept damp, used with shade, water and sensible exercise timing. A vest helps prevent overheating during activity; it does not treat heatstroke. Here is how the main types compare, what to check on fit, and which dogs gain the most.
By Matt GarnettUpdated November 14, 20264 min read2 sources
What a cooling vest can and cannot do
A cooling vest slows how fast a dog heats up during activity. In a field study of 13 military working dogs running 20 minutes in warm August weather, published in a peer-reviewed journal, dogs wearing an evaporative vest had a core temperature about 0.62 °C lower on average than dogs with no vest. The study was small and used fit, athletic German Shepherds and Belgian Malinois, so treat it as encouraging rather than a guarantee for every pet.
The same authors say the vests are meant to prevent heat build-up during exertion and are not a treatment for heatstroke. For that, they note that water immersion appears more effective, and that very cold water can cause shock. In other words, a vest is a prevention tool, and it works best with shade, fresh water and walks at cooler times of day.
The main types of cooling vest
Evaporative vests are made of a layered fabric that you soak in water and wring out. As the water evaporates it draws heat away from the dog. In the study above, the evaporative vest performed better than a phase-change vest, which holds cooling packs and showed no significant average difference in core temperature. Of the two, the evaporative type has the stronger evidence behind it. A design like this evaporative cooling vest is soaked, wrung out and worn damp.
Breathable mesh and reflective vests, like the reflective dog cooling vest, are lighter, dry faster and add sun protection, which suits shorter outings. Neck wraps, such as a cooling mesh neck wrap, cover less of the body, so they are a gentler option for mild days and for dogs that dislike a full vest.
Fit and coverage
A vest only cools the skin it touches, so the best fit is snug against the chest and back without restricting the shoulders or breathing. Measure your dog's chest girth and back length with a soft tape and compare with the size chart before you order, since sizing differs between brands. If the vest slides around, or leaves gaps over the back, it will cool unevenly.
Check that the straps and fasteners do not rub under the front legs, and look for a harness opening if you walk your dog on a harness. After a few minutes of wear, run a hand under the vest: it should feel cool and damp, not warm and soggy. If a wet vest stops feeling cool, take it off and re-wet it, because a warm damp layer can trap heat.
Which dogs benefit most
The American Kennel Club lists puppies, senior dogs, overweight dogs, dogs with health problems and short-snouted breeds as higher-risk for heatstroke. For these dogs, a vest is one extra layer of protection on top of avoiding the hottest hours.
If your dog is short-snouted, has heart or breathing disease, or is older, ask your vet before relying on any gear. Short-nosed dogs cool themselves poorly, and a vest does not change that. The safest plan for them is to limit exercise in heat, stay indoors in air conditioning and watch closely for early warning signs.
What to avoid
Avoid vests that are dark, heavy or tight, since these can add heat. Do not use a dry vest, a vest that has stopped feeling cool, or any product that claims to make heatstroke safe. Never leave a dog in a parked car, even briefly, with or without a vest; the AKC says heatstroke can develop within minutes in enclosed spaces.
Do not leave a wet vest on an unattended dog, and take it off before the dog goes into a crate. Check the vest and skin after use, and let the vest dry fully between outings so it stays fresh.
Heatstroke signs and what to do
The AKC lists heavy panting, rapid breathing, excessive drooling, bright red gums and tongue, hot skin and trouble with balance as early signs, with collapse, pale or bluish gums and muscle tremors as severe signs. If you see these, move your dog to a cool, ventilated area, wet the dog with tepid or cool water, not ice-cold, and use a fan.
Heatstroke is an emergency. Call your vet or the nearest emergency vet immediately and head there with the car's air conditioning running. Even if your dog seems to recover, see a vet, because internal damage may not be visible.
Where to go next
If a vest looks right for your dog, browse our full range of dog cooling vests. If you also want somewhere cool for your dog to rest at home, see our dog cooling mats, and our guide to choosing a cooling mat covers the types.
This page is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your pet.
Common questions
Do cooling vests really work for dogs?
A small study of working dogs found that an evaporative vest lowered core temperature during a 20-minute run in warm weather. The authors say vests help prevent heat build-up, not treat heatstroke, so use them alongside shade, water and cooler exercise times.
How do you use a dog cooling vest?
For an evaporative vest, soak it in water, wring it out, and fit it snugly over your dog's chest and back. Re-wet it when it stops feeling cool, and take it off when the dog is resting indoors or crated.
Can a cooling vest treat heatstroke?
No. The study authors state that vests are not indicated for treating heatstroke. If you suspect it, cool the dog gently with tepid water and a fan, and get to a vet immediately.
Which dogs are most at risk of overheating?
The AKC lists puppies, senior dogs, overweight dogs, dogs with health issues and short-snouted breeds, plus dogs with heart or laryngeal conditions. Talk to your vet about a plan for hot days if your dog fits any of these.
Sources we checked
This guide is general information, not veterinary advice. If your pet is unwell or injured, contact your veterinarian.
