ThunderShirt is an easy, effective and safe solution for calming agitated and anxious dogs. It is excellent for fear of fireworks, thunderstorms, cars or traveling. The ThunderShirt is easy to put on and ensures a consistent pressure on the core of the dog. Pressure has been used successfully to reduce anxiety for many years e.g, swaddling a baby. This pressure has a calming effect for most dogs. ThunderShirt is to be used as a solution for dogs in stressful situations such as travel, separation, kennel stays, fear of loud noises, fireworks. Like people, dogs come in many different shapes and sizes, so if your dog has unusual proportions, you may need to go up or down a size versus the "standard" measurements. The ThunderShirt is designed to be very adjustable to accommodate different dog shapes and still be easy to put on.