K9 Sport Sack Kolossus** Please measure your dog before ordering to ensure the correct size. Measure from collar to base of tail** The Kolossus is the worlds best backpack carrier for bigger dogs, built to keep both you and your pup safe and comfortable. It combines advanced features for pet and human support, including an adjustable shoulder and torso fit to suit all body types. Designed for medium to large dogs, its perfect for serious adventureswhether youre exploring