Fur is a soft, thick covering of hair that grows on the bodies of many animals, including cats, dogs, and rabbits. It serves as insulation, helping to keep these animals warm in cold weather. Fur can vary in color, length, and texture, depending on the species and its environment. Fur is also used by humans for clothing and accessories, although this practice has raised ethical concerns regarding animal welfare. Many people now choose synthetic alternatives to real fur, which mimic the look and feel of natural fur without harming animals.