Thank you for viewing! This is an outing hammock that can be secured to a hard carrier. It has a total of 8 strings, 2 each, so it can be securely fixed to the carrier. It has a pocket, so your ferret can sleep peacefully. The inside is lined with fleece (anti-pilling treatment) on both top and bottom, so they can stay warm. The back of the hammock is made of 13-ounce washed denim, making it durable. It can be used for small animals other than ferrets. Hammock size: Approximately 30cm (length) x 30cm (width) (±5mm) String length: Approximately 30cm (±5mm) Carrier size in the image: Outer dimensions: Approximately 33cm (width) x 51cm (depth) x 30cm (height) ☆The carrier in the image is a new, unused item. ☆Due to the thickness of this product, it cannot be shipped with other items.