28" to 52" blue canicross belt from Kurgo.

The Long Hauler Canicross Belt is designed to work with the Long Hauler Joring Kit, but can also be used on its own as a backpack by removing the leg straps. Fully adjustable to fit waists between 28'' and 52'', it is lightweight and fully padded for comfort. The waistbelt contains plenty of storage and a water bottle holder, to ensure you have everything you need for your adventure.