ThunderShirt Polo Anxiety Vest for Dogs, Blue, Small

$49.99 Chewy Price
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About This Item

Details

  • Patented design applies gentle, constant pressure to calm anxiety, fear, and over-excitement. This gentle hugging produces a dramatic calming effect.
  • Calms your dog during fireworks, thunder, separation, travel, vet visits, grooming, and much more with no training and no medication.
  • Comfortable and easy on/off. Made of durable, breathable, soft fabric that is washable.
  • Recommended by trainers and veterinarians to relieve stress-related behaviors such as jumping, excessive barking, and inappropriate marking.
  • Proven effective in over 80% of dogs.

Instructions

Size

FAQ

Learn More About ThunderShirt From Our Team of Experts

Questions & Answers

19 Customer Questions


I'm interested in the "Polo" thunder shirt, is it made in USA? If not could you tell me where? I am very interested in supporting USA. This information may help me make a decision. Thank you, you guys are just the best!!!

Answer by ChewyAug 18, 2019
This shirt is manufactured in the United States.

How to size

Answer by ChewyJul 25, 2021
To get the most accurate size anxiety vest for your pet, measure the girth of their chest, around the widest part of your dog's torso right behind the front legs, with a cloth tape measure. Pull the cloth tape snug, but not tight. If you don't have a cloth tape measure, you can use a piece of string and measure it with a rigid ruler afterwards. If your pet measures between two sizes, we advise ordering the smaller as this product works through compression.

Do you leave the thundershirt on all the time or only when your dog is getting anxious?

Answer by ChewyFeb 10, 2020
ThunderShirt is designed to be safe to leave on for extended periods of time when appropriate for the situation or issue. If your dog will be wearing a ThunderShirt for more than one hour at a time, we recommend removing ThunderShirt every one to two hours during the initial periods to check for any signs of irritation points. Irritation points are very rare, but it is best to be cautious.

Where does the thundershirt sit on the chest area or does it impact the neck?

Answer by ChewyJun 13, 2018
The ThunderShirt uses Velcro to secure the shirt around the upper part of your pet's chest. It rests just below the neck. Please reference the below image.

4.2
Rated 4.2 out of 5 stars
560 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Design

87% Positive

Ease of Use

83% Positive

Effectiveness

86% Positive

Material

88% Positive

383 Customer Reviews



Rated 5 out of 5 stars
By BRIDGETTE on Dec 22, 2025

Perfect! He's more calm at bed time

Apollo tries to bite everything off that I put on him like Collars and harnesses. When I put this thunder shirt on him, he seems to like it a lot. He's a 9lb Maltese/Shih

Apollo tries to bite everything off that I put on him like Collars and harnesses. When I put this thunder shirt on him, he seems to like it a lot. He's a 9lb Maltese/Shih Tzu mis and small fits him perfect.


Rated 5 out of 5 stars
By Patricia on Dec 8, 2025

Thunder vest worked!

Princess is so anxious that she shakes at anything unexpected or unfamiliar. Her Thundervest calms her down so she can just watchfully rather than cowering in a

Princess is so anxious that she shakes at anything unexpected or unfamiliar. Her Thundervest calms her down so she can just watchfully rather than cowering in a corner


Rated 5 out of 5 stars
By Randy on Sep 17, 2025

Vest of Protection

I wasn’t sure if this would really work, but it did. There are people in my neighborhood who always light large, illegal, fireworks every July. The police do nothing

I wasn’t sure if this would really work, but it did. There are people in my neighborhood who always light large, illegal, fireworks every July. The police do nothing about it, even though we live in a brushfire zone. I bought this vest for my little Yorkie girl because the fireworks send herb nto a panic. It calmed her down almost immediately. Now, when a thunderstorm comes, I ask her if she wants her Vest of Protection. She eagerly runs up to me and waits for me to put it on. Great product.


Rated 3 out of 5 stars
By Asjylyn on Oct 19, 2025

Fits well, seems well-made

The XS fits my 7.6 lb Yorkie. Sadly doesn’t seem to help my little dude. He still loses his mind during thunderstorms. I’m going to keep trying it - if it keeps

The XS fits my 7.6 lb Yorkie. Sadly doesn’t seem to help my little dude. He still loses his mind during thunderstorms. I’m going to keep trying it - if it keeps him even a little calmer, it’s worth it


Rated 5 out of 5 stars
By Kathleen on Jul 23, 2025

It actually works!

My pitbull is 12 years old. She shakes and pants uncontrollably with thunderstorms and fireworks. I can never calm her down. Calming spray helps a little but not

My pitbull is 12 years old. She shakes and pants uncontrollably with thunderstorms and fireworks. I can never calm her down. Calming spray helps a little but not enough. I decided this year with 4th of July coming to give it a try. The picture below is her sound asleep with all the fireworks going off. I have since used it for thunderstorms. Sometimes it only helps a little and sometimes it helps a lot. But it has made her so much more comfortable.


Rated 4 out of 5 stars
By Serge on Jul 10, 2025

Easy to use and it does help

The Thundershirt has, without doubt, the best velcro of any dog product we’ve ever had. That said, it means that you have to practice with it before you need it

The Thundershirt has, without doubt, the best velcro of any dog product we’ve ever had. That said, it means that you have to practice with it before you need it. I found that I could leave the chest strap connected and just slip it over my pooch’s head. From there it is straight forward providing you have it right side up. It definitely reduced the shaking caused by fireworks. Only gave it 4 stars because I was hoping for magic, but I held my little guy with and without it and it definitely helps.


Rated 5 out of 5 stars
By Clair on Oct 23, 2025

Benny loves his Thunder Shrit

With quite a few serious thunder storms lately the shirt will help with his anxiety.

With quite a few serious thunder storms lately the shirt will help with his anxiety.


Rated 3 out of 5 stars
By Caroline on Jul 17, 2025

eh

Looks very cute but not convinced it’s worth the money. Our beagle wears it no problem and made if good material. Worked okay for fireworks when a calming treat

Looks very cute but not convinced it’s worth the money. Our beagle wears it no problem and made if good material. Worked okay for fireworks when a calming treat was also given but still shakes nonstop before and during thunderstorms.


Rated 5 out of 5 stars
By Annette on Sep 21, 2025

Well-made and kept her calm

The most amazing thing is that it works. My dog is slightly neurotic settle down and could actually be calm

The most amazing thing is that it works. My dog is slightly neurotic settle down and could actually be calm


Rated 5 out of 5 stars
By Wanda on Jun 22, 2025

Excellent product and well- made

I bought this to replace a very old thundershirt. This shirt is essential in helping our Bostie withstand the thunderstorms in our area. The velcro panels allow

I bought this to replace a very old thundershirt. This shirt is essential in helping our Bostie withstand the thunderstorms in our area. The velcro panels allow me to snuggle him up comfortably and it makes him feel more secure.