Pet Cat Backpack Travel Carrier Double Shoulder Bag Cat Backpacks For Bag Small Pets Handbag Carrying Products. Cat Carrier Travel Backpack ×4 Colors. For Cats & Humans. Foldable Pet Carrier Backpack bag backpacks Cat Outdoor Travel Carrier Double Shoulder Bag Cat Backpacks For Bag Small. It holds the most weight on the market. Cat Backpack is the perfect backpack for hikers, outdoor lovers, and adventurers. It’s also great for basic travel needs like trips to the vet and car rides and gives your cat plenty of visibility to watch the world go by.