Super comfortable: Double neck and chest adjustable shoulder straps with soft frictionless sleeves make it your pet's favorite carrier. Comfortable and durable fabric: breathable and soft. Non-suffocation: Unlike a collar, it will not harm your pet's sensitive throat and trachea, especially when your dog pulls or bows. Reflective lights sewn all around ensure safety and visibility at night. Easy to wear: No need to lift your paws or step on it to put it on. Quick-release, heavy-duty buckle can be easily removed. NO-TANGLE: Unlike the collar type, it will not cause lease entanglement. Sturdy safety handle: immediately control your dog in training and emergency situations. Help the dog get out of the water, bring the physically challenging pet into the vehicle or easily fasten it to the car seat belt. (The belt is free)Color: as shown in the picture. Size: XS: Suitable for dogs with a chest circumference of 13.3--16.9 inches, for dogs with a neck circumference of 10.6--11.8 inches, and dogs with a weight of 5--11 pounds. S: Suitable for dogs with a chest circumference of 17.7-20 inches, suitable for dogs with a neck circumference of 15.7-18.8 inches, and dogs weighing 11-22 pounds. M: Suitable for dogs with a chest circumference of 20.4-23.6 inches, for dogs with a neck circumference of 17.7-21.2 inches, and dogs with a weight of 22-33 pounds. L: Suitable for dogs with a bust of 24.8-35.8 inches, for dogs with a neck circumference of 21.2-26.3 inches, and dogs with a weight of 33-66 pounds. XL: Suitable for dog bust 28.3-35.8 inches, suitable for dog neck circumference 23.6-27.5 inches, suitable for dog weight 66-99 pounds.