Thundershirt

How It Works

Go to Thundershirt for more info and videos on how it works.

With its patent-pending design, Thundershirt’s gentle, constant pressure has a dramatic calming effect for most dogs if they are anxious, fearful or over-excited. Based on surveys completed by over two thousand customers, over 80% of dogs show significant improvement in symptoms when using Thundershirt. Thundershirt is already helping tens of thousands of dogs around the world, and is recommended by thousands of veterinarians and dog trainers.

As for WHY Thundershirt’s gentle pressure works to calm a dog, experts such as Dr. Temple Grandin believe that pressure has a calming effect on the nervous system. Using pressure to relieve anxiety has been a common practice for years.

For example:

  • TTouch dog trainers use pressure to address a wide variety of anxieties.
  • Veterinarians use pressure to relax cattle when they are administering vaccinations.
  • People with autism use pressure to relieve their persistent anxiety.
  • Children with certain behavioral problems use pressure shirts and weighted vests to relax and focus.
  • Parents use swaddling to calm an inconsolable newborn infant.

Until now, there just hasn’t been a well-designed, inexpensive pressure wrap commonly used for dog anxiety. Thundershirt is changing that! Thousands of veterinarians and dog trainers now recommend Thundershirts for their anxiety cases.

How To Use Thundershirt


Thundershirt is an excellent treatment for most types of dog anxiety and fear issues. For many anxieties, we recommend just putting on a Thundershirt and observing the results (No training!). You very well may see significant improvement for noise, crate, travel, barking and others with absolutely no training. For more complicated anxiety cases, we recommend using Thundershirt as part of a behavior modification program.

One thing is for certain, for a very large percentage of dogs, Thundershirt’s gentle, constant pressure has a terrific calming effect. This has obvious benefits for most types of anxiety. But Thundershirt is also a very useful tool for managing excitability or hyperactivity with strangers, on the leash, or in a training environment. Thundershirt’s calming effect helps a dog to focus (or refocus) her energies in a more constructive direction, allowing training to be more effective.

For selecting the correct size, your dog's chest size is the best measurement to use. If not available, your dog's weight may be used as a guideline.

Measure “Chest Size” as illustrated by red arrow below

sizing chart
SizeChest SizeWeight
XXS 9"-13.5" < 12 lbs.
XS 13"-18" 10-18 lbs.
S 16"-23" 15-25 lbs.
M 18"-26" 20-50 lbs.
L 24"-32" 40-70 lbs.
XL 31"-40" 60-100 lbs.



Pin It Fancy

Related Items

Clicker Leash has an ergonomic handle with a built in clicker
Clicker Leash $49.95
+ Quick View
Crinkits. Colorful rubber covers that slip over regular water bottles
Crinkits $21.95
+ Quick View
Gentle Leader head halter
Gentle Leader® Head Halter $27.50
+ Quick View
Hol-ee Roller Dog Toy
Hol-ee Roller from $9.50
+ Quick View