There are level loops and multilevel loops. Because the yarn tips aren't exposed, these carpets tend to wear extremely well, making them good for high-traffic areas, such as hallways and family rooms.
Level loop pile: Loops are the same height, creating a uniform look. This style generally lasts a long time in high-traffic areas. Many of today's popular Berber styles are level loop styles with flecks of a darker color on a lighter background.
Multi-level loop pile: This style usually has two to three different loop heights to create pattern effects, providing good durability and a real dimensional look.