Comfortable and durable： Our pet backpack is made of premium nylon and polyester fiber, soft but sturdy, portable and durable. Breathable mesh provides good ventilation and makes dogs in the pet backpack do not feel stuffy or uncomfortable. Recommended size：The size of the pet backpack is 28*18cm. Chest size : Within 30cm.Reference back length 23-27cm We strongly recommend for puppies under 5 pounds.Please measure your pets and choose the correct size. Adjustable straps：The chest bag for pets is designed with adjustable straps, which won't get in your way. Equipped with thick breathable padding, which helps relieve the burden on your shoulder and back, making it more comfortable to wear. Easy to use：The paw and tail design allows your pet to slide easily. Double zippers and elastic openings allow you to comfortably fit your dog inside; the side button ensures quick installation. The dog carrier can be carried in the front or back if you want. Perfect for outdoor： The pet backpack can help you carry your dogs or cats easily and have hands free outside. Perfect for hiking, traveling, biking, walking with your pet. It is a good helper for going out. Blue color Quantity delivered: 1 piece Note: The data is manual measurement, please allow 1-3cm error, due to differences between light and screen, there will be a certain difference in color, the specific received in kind shall prevail.