Gophers are heavily built, and most are moderately large. They usually weigh a few hundred grams. A few species reach weights approaching 1 kg. Most gophers have brown fur which often closely matches the color of the soil in which they live. Their most characteristic feature is their large cheek pouches. The "pocket" in their name comes from these pouches. These pouches are fur-lined, and can be turned inside out. They extend from the side of the mouth well back onto the shoulders. They have small eyes and a short, hairy tail which they use to feel around tunnels when they walk backwards.