Similar to swaddling a newborn baby, gently wrapping a dog in Calm Coat has a peaceful effect that is beneficial for both you and your dog. The patent pending design gently hugs your dog, much like hugging a child. Calm Coat provides relief from behaviors including hyperactivity, separation anxiety and thunderstorm anxiety to name a few. Most effective anxiety solution as voted by veterinarians Already helping hundreds of thousands of dogs across the country Great for storms, separation, travel and many other anxieties No need for training or medication Sizing: XS: Chest Size: 13" – 18"; Weight: 10lbs – 18lbsSmall: Chest Size: 16" – 23"; Weight: 15lbs – 25lbsMedium: Chest Size: 18" – 26"; Weight: 20lbs – 50lbsLarge: Chest Size: 24" – 32"; Weight: 40lbs – 70lbs Made in the U.S.A.