Bus routes operating in DC or Maryland use only a number, or a letter and a number, as noted below.
Cut pile carpets cut the yarn tips so there arenât any loops. Cut pile carpets tend to be denser and softer than loop pile. There are several types of cut pile: 1  Plush has an even, smooth texture with a formal appearance.  Saxony has a smooth finish, but the fibers are longer and twisted to give each fiber more body.
The type of fiber used in a carpet plays a key role in how it feels and how well it performs. Basically, there are two fiber types: natural and man-made. The predominant natural carpet fiber is wool. Other natural materials such as silk, linen, and cotton are sometimes blended with wool, but rarely used alone.