K9 Sport Sack Knavigate** Please measure your dog before ordering to ensure the correct size. Measure from collar to base of tail** The Knavigate is a combination of all the best features from K9 Sport Sack's backpack dog carriers. This carrier works for large dogs. Each size is equipped with an internal frame as well as a padded hip belt to comfortably support more dogs owners of all body types. The Knavigate was made for the most avid adventurers and allows for longer,