Like most tree-kangaroos, Goodfellow's tree-kangaroos are very different looking from terrestrial (land) Kangaroo species. Unlike land living kangaroos, their legs are not very large compared to their forelimbs (arms), which are strong and end in hooked claws for grasping tree branches. Goodfellow's tree-kangaroos have long tails for balance. These physical traits help them with a mostly tree-living life. They have short, woolly fur, usually reddish-brown in color, a gray-brown face, yellow-colored cheeks and feet; pale stomachs, long, golden-brown tails, and two golden stripes on their backsides. They weigh about 7 kilograms (about 15 pounds).