The Volas pet Carrier Backpack for Small Dogs listing says a cozy and secure pet-fit design, airy mesh panels, padded adjustable shoulder straps, a strong yet lightweight build, and use for walks, trips and everyday adventures. It is in Pets.
The first photo is a cream and brown front-carry bag with a bear pocket and leg holes, not a boxed backpack in that still.
See the Volas carrier page.