Orangutans have developed a remarkable ability to travel through the forest treetops, and there they also spend the night sleeping in nests made of leaves and branches. Their reddish brown hair color is unique in the ape world. An adult male is twice the size of a female and can reach a height of 1.4 m and a weight of about 70-90 kg.
Their long, strong arms can reach a span of about 2 m, specialized for swinging from tree to tree, while the legs are short. This give them some disadvantage on the ground, and they rarely come down from the trees. Like humans their hands have four long fingers with an opposable thumb which can be used to grasp objects. (Bjorn Grotting) Src: indonext.com