Fur and hair are both types of body coverings found on mammals. They are made of a protein called keratin and serve various functions, including insulation, protection, and sensory perception. Fur is typically denser and softer, providing warmth, while hair can vary in thickness and texture, depending on the species. Both fur and hair grow from follicles in the skin and can be shed and regrown. The color and pattern of fur and hair can help with camouflage or attract mates. Animals like cats and dogs have fur, while humans and other mammals have hair, which can also be styled and groomed.