HOW TO USE? Step 1: Place the dog anxiety vest on you dog's back, adjust Neck Straps to the biggest setting, put the Neck Straps around the dog neck. Step 2: Wrap the Chest Flap under the torso and secure with fasteners onto the body. Make a comfortable, snug fit. Step 3: Wrap the Neck Straps around the dog’s neck and secure with fasterners. Adjust for a comfortably snug fit as necessary. Size Information: Size “S” is for chest size 11-15 inch, weight 8-20 pounds. Similar breed is Beagle, Dachshund, Pug, Boston Terrier,Puppy. Size “M” is for chest size 14-22 inch, weight 20-38 pounds. Similar breed is Whippet, Pinscher, Schnauzer. Size “L” is for chest size 19-27 inch, weight 38-58 pounds. Similar breed is Basset, Hound, Bulldog, Siberian Husky, Small Labrador. Size“XL” is for chest size 22-35 inch, weight 58-100 pounds. Similar breed is Large Labrador, Boxer, German Shepherd, Rottweilers. Note: Dogs come in all different shapes and sizes. For proper fit, please choose a correct size according to your dog's chest measurements. REDUCE ANXIETY AND KEEP CALM: Dog Anxiety Vest will effectively helpful to reduce your dog's anxiety during thunderstorms, loud oises, travel, fireworks, strangers, separation, vet visits and many other anxiety situations. SOFT AND BREATHABLE FABRIC:Our dog anxiety jacket is made of elastic fabric, soft and breathable. The thunder jacket can apply gentle, consistent pressure to calm your dog's anxiety, fear and and over excitement. The thunder coat for dogs can be machine washing, hand washing and quick drying. MULTIPLE SIZES AND COLORS: Dog calming vest are available in light grey, light green and light blue. Size S to XL are available. Size “S” is for neck 10-12 inch, chest 11-15 inch. Size “M” is for neck 12-19 inch, chest 14-22 inch. Size “L” is for neck 17-20 inch, chest 19-27 inch. Size “XL” is for neck 20-25 inch, chest 22-35 inch. EASY TO WEAR: The dog anxiety relief coat adopt magic tape design, easy to put on and take off. This dog anxiety wrap vest has adjustable designs on the neck and back, ensuring that the clothing is suitable for your dog. EFFECTIVE ANXIETY SOLUTION: The dog calming vest can effectively help your dog reduce anxiety and will not cause any burden on the dog's body. Many veterinarians and dog trainers recommend using dog anti anxiety vests.