Artificial ski slopes or dry ski slopes are ski slopes that mimic the attributes of snow using materials that are stable at room temperature, to enable people to ski on them. The term "dry ski slopes" is also used but can be misleading as many slopes are lubricated using a mist or jet system to increase speed and prevent damage to equipment from friction heat build-up. As a general rule, they are found predominantly in the U.K. as European countries tend to have ready access to real snow fields, as does North America.