This ThunderShirt is designed to provide comfort to your dog during moments of anxiety. The vest is made with high-quality polyester material and fits dogs up to 18 pounds in weight, specifically tailored for Chihuahuas. The gray color of the vest is stylish and the ThunderShirt brand is well-known for producing high-quality pet clothing. Whether your furry friend is afraid of thunderstorms or has separation anxiety, this vest will help them feel calm and relaxed.