ThunderShirt is the original, natural calming solution that helps reduce anxiety in dogs in a drug-free way. Like swaddling an infant, ThunderShirt's patented design applies gentle, constant pressure to calm all types of anxiety, fear, and overexcitement issues in dogs.
Proven to be over 80% effective in reducing anxiety for fireworks, thunderstorms, separation anxiety, travel, vet visits, problem barking and more. Treat anxiety, fear, and over-excitement in style! You'll love the ThunderShirt's calming effect on your pup.
| Size | Dog weight | Chest |
| XXSmall | under 8 lbs | 9-13 in |
| XSmall | 8-14 lbs | 13-17 in |
| Small | 15-25 lbs | 17-21 in |
| Medium | 26-40 lbs | 21-25 in |
| Large | 41-64 lbs | 25-30 in |
| XLarge | 65-109 lbs | 30-37 in |
| XXLarge | over 110 lbs | 37-50 in |
