Breathable Material The pet harness lining is made of breathable sandwich mesh with soft padding.Cozy matrial can keep your pet cool for hiking camping outdoor walking even on hot summer days Multifunctional Pet Supplies It is dog harness,but backpack as well,dual functions,more practical.The I-shaped harness on the chest is detachable,but the backpack is not adjustable which is sewn in the strap.Two fuction styles meet the different needs of pets Adjustable Harness Strap The pet harness size is adjustable,perfectly fit the pet's body,not easy to slip off.And the 47.2 leash that came with,it is durable and matches with the harness part. Cute Dog Harness Backpack A backpack with exquisite fruit embroidery, cute and practical, perfect for pets to carry a small toy little treats or poop bags inside Small Dog/Cat Harness This pet harness is suitable for small cats/dogs weighing 3-16.5 lbs,please refer to our size chart before ordering,the size information of different stores may vary,go up a size if u have a fur baby with a lot of hair or if your dog is plump at all.S: fits 3-7 lbs M: fits 7-16.5 lbs