Canine Equipment Ultimate Trail Dog Pack Carry all the supplies you need for a walk in the park or hike on the trails Comfortable and secure webbing harness was based on designs used by working dogs Detachable side panniers, size large are 7L each in volume for a total of 14L per pack Sectioned compartments including pockets to anchor water bottles and a port for poop bags to reduce load shifting and help balance out weight of packs Size Large ideal for dogs 80 plus-pound with a girth of 35-44-inch