Best dog carrier backpacks to hiking, cycling and puppy days out PetAmi Dog Backpack Carrier For Small Large Cat, Pet, Puppies Pet Carrier Backpack, Quick Fit Legs Out Adjustable Pet Dog Front These Cute Little Dog Backpacks Lets Them Hold Their Puppies On Their Back Dog Front Carrier Backpack, Dog Backpack Carrier Soft Pad, Pet Legs Out. About this product: Our backpacks are not only adorable, but well made! They are lightweight and durable perfect for kids! They feature a large exterior pocket on front as well as two exterior pockets. There is an additional large pocket inside for extra organization. Full Size: 16 x 13 x 3. 5 *Ships within 7 days of order.