The original ThunderShirt has the best patented pressure wrap design available to reduce anxiety for dogs. In a 2022 survey, Customers saw improvement in anxiety issues in over 85% of their dogs. ThunderShirts are easy to use - they're adjustable for just the right pressure to calm your dog. The patented ThunderShirt design applies gentle, constant pressure, like a hug, that may calm anxiety, fear, and over excitement due to a variety of environmental triggers. ThunderShirt is also great for rescue dogs and there is no training required. Our ThunderShirts are made of machine washable, soft, breathable fabric, making them very comfortable for your dog. We stand behind ThunderShirt. If you are not satisfied for any reason, simply return within the Amazon return window for a refund of your purchase price. Let us help your family today!