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. It is this pressure that has a dramatic calming effect for most dogs if they are anxious, fearful or over-excited. From real world experience, we know with certainty that Thundershirt DOES WORK. Based on surveys completed by over 1,000 Thundershirt users, over 85% of dogs show significant improvement in anxiety symptoms when using Thundershirt.

As for WHY Thundershirt’s gentle pressure works to calm a dog, experts 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.

Sizing Chart

Size	Chest Size	Weight
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.
XXL	38"-50"	> 90 lbs.

Measure “Chest Size” as illustrated by red arrow below