In textiles, pile is the raised surface or nap of a fabric, which is made of upright loops or strands of yarn.[1] Examples of pile textiles are carpets, corduroy, velvet, plush, and Turkish towels.[2]. The word is derived from Latin pilus for "hair"[3]
The surface and the yarn in these fabrics also called "pile". In particular "pile length" or "pile depth" refer to the length of the yarn strands (half-length of the loops).
The types of pile include