ThunderShirt Anxiety Vest for Cats, Heather Grey, Medium

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At a Glance

  • Calming
  • All Lifestages

$39.95 Chewy Price
$39.99 List Price
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Pay in 4 interest-free payments of $9.99. .

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 cat 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 scratching, excessive meowing, and inappropriate marking.
  • Proven effective in over 80% of cats.

Instructions

Size

Learn More About ThunderShirt From Our Team of Experts

Frequently bought together

Questions & Answers

20 Customer Questions

Does this work well for urine marking?

Answer by Chewy • Apr 06, 2024
ThunderShirt Anxiety & Calming Solution for Cats is recommended by trainers and veterinarians to relieve stress-related behaviors such as scratching, excessive meowing, and inappropriate marking.

Foes this short reusable and washable?? I'm about to leave her with my sister for a few months then bring her with me to another country. How often should my cat wear the shirt while she stays with my sister?? Thank you

Answer by Chewy • Oct 07, 2018
This shirt is reusable and washable, and should not be worn for more than 5 hours at a time. Using it for longer may cause the jacket to lose its effect and the cat could become desensitized to the jacket.

Is good when doing the nail clips in my cat?

Answer by Chewy • Jun 01, 2019
Thundershirt’s gentle, constant pressure has a dramatic calming effect for most cats if they are anxious, fearful or overexcited during grooming.

Need to move my cats 1200 miles. 2 days of 11 hour driving. Shirt a good option?

Answer by Chewy • Jun 27, 2018
This ThunderShirt is helpful during travel, fireworks, thunder, separation, vet visits, grooming, and much more. If traveling for that length of time, it is recommended to only use the shirt for time spans of up to 5 hours.
Reviews
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3.8
Rated 3.8 out of 5 stars
384 Ratings
Terms & Conditions

291 Customer Reviews

Rated 5 out of 5 stars
By Amber on Dec 10, 2025

Worked for Car Travel

Calmed my 9 month old calico long hair cat. She is afraid of most new things but used to hate the car. After about 30 mins to an hour in this coat she fell asleep

Calmed my 9 month old calico long hair cat. She is afraid of most new things but used to hate the car. After about 30 mins to an hour in this coat she fell asleep and totally calmed down. It is tight as designed so we didn't leave it on for longer than 4 or 5 hours without a break and made sure she had cool air because it makes her a bit warm but it works!

Rated 3 out of 5 stars
By Jennifer on Sep 20, 2025

3.5 is perhaps more accurate

This does relax my nervous cat a bit, but it was not enough to prevent her fear-based aggression. If you put it on her, she usually gets relaxed and sleepy, but

This does relax my nervous cat a bit, but it was not enough to prevent her fear-based aggression. If you put it on her, she usually gets relaxed and sleepy, but if you introduce her trigger (our other cats), it is like she isn't wearing it at all and will even lunge at them (through the screen door we have set up for introductions). The sizing is also a little strange; it seems like no matter how I fasten it, it's a little too far forward behind her front legs. The patch for calming spray is in a weird spot (on their shoulder where they can lick it). We've tried various calming sprays, diffusers, supplements, and treats, and this was a bit of a last resort before moving to a prescription. She does seem to like it, so I think it is comforting. So: helps a bit, but if your cat has more intense anxiety, it probably will not work as intended.

Rated 1 out of 5 stars
By Erick on Dec 18, 2025

Bad quality fabric

Cat scratched at the neck portion and went to lick herself. Got her tooth stuck in the loose thread, leaving her mouth open and caused her distress.

Cat scratched at the neck portion and went to lick herself. Got her tooth stuck in the loose thread, leaving her mouth open and caused her distress.

Rated 4 out of 5 stars
By Kennedy on Jul 29, 2025

Works!!!

My girl gets overstimulated easily and when she’s overstimulated she tends to chase and play too rough with her sisters. She turns into a little bully. When I notice

My girl gets overstimulated easily and when she’s overstimulated she tends to chase and play too rough with her sisters. She turns into a little bully. When I notice this behavior I put her thundershirt on. She goes through the 7 stages of grief with it for a few minutes but then really calms down and relaxes. I leave it on for 30 minutes to an hour, always supervised. Wish it didn’t have to be velcro but the thundershirt really helps her.

Rated 3 out of 5 stars
By Kayla on Oct 22, 2025

Not great for bigger kitties

This shirt works great for my smaller kitty but my little round girl can get her leg out of the neck opening in about .5 second.

This shirt works great for my smaller kitty but my little round girl can get her leg out of the neck opening in about .5 second.

Rated 1 out of 5 stars
By Lydia on Aug 24, 2025

Velcro and Cats: Bad Idea

I had difficulty getting this on my cat, and once it was on, she wriggled out of it within seconds. The Velcro stuck to her fur, which in turn made the Velcro less

I had difficulty getting this on my cat, and once it was on, she wriggled out of it within seconds. The Velcro stuck to her fur, which in turn made the Velcro less sticky. This was an expensive and failed experiment in calming my cat before a trip.

Rated 5 out of 5 stars
By Kris on Jul 31, 2025

this vest actually works, turned an anxious cat into a purring sausage!

My fearful anxious cat didn’t love putting this vest on, but once it was fully on, she lay there like a complacent purring sausage and was happy to wear it. She

My fearful anxious cat didn’t love putting this vest on, but once it was fully on, she lay there like a complacent purring sausage and was happy to wear it. She didn’t want to walk around with it on, but with more time she’ll probably get used to it. I’ll try it again next time she needs to go to the vet.

Rated 3 out of 5 stars
By Melissa on Jun 23, 2025

7.5 lb slim cat size Small seems too small

I just got this for my cat after having used two for my dog over the last 10 years. The sizing chart, small is for a cat under 9 pounds. My cat is 7.5 lbs and slim

I just got this for my cat after having used two for my dog over the last 10 years. The sizing chart, small is for a cat under 9 pounds. My cat is 7.5 lbs and slim. The vest fits lengthwise but I can't fasten the top flap because then it would be too tight. I feel like the medium would be too large in length. Wondering if it will get looser because the fabric is also stiff. They should've used thinner Velcro for the straps for the cat version. Unsure if I'll be keeping.

Rated 2 out of 5 stars
By Nancy on Oct 2, 2025

Thundershirt

No matter how much enticing, I could not get my cat to wear it. When I forced it on her she freaked out, rolled around then threw up.

No matter how much enticing, I could not get my cat to wear it. When I forced it on her she freaked out, rolled around then threw up.

Rated 4 out of 5 stars
By dawnruhnaybrown on Jun 24, 2025

Size chart isn’t perfect

Clio is a senior cat and thinner than she used to be at 7.6 pounds, but she’s healthy. She goes to the vet monthly for her arthritis shot. The size chart says under

Clio is a senior cat and thinner than she used to be at 7.6 pounds, but she’s healthy. She goes to the vet monthly for her arthritis shot. The size chart says under 10 pounds is a small. I was wary, but bought the small. I tried, but no luck. If it worked as a cape it would be fine. Lol It won’t even meet around her torso. Chewy immediately refunded me and I’ll be using it to purchase the next size up, medium, ASAP. I’m sure it’s worth it. Just be aware that the size chart isn’t perfect for every pet.