the knots in place. A rug can consist of 25 to over 1,000 knots per square inch. Fabrics Warp pile weave Velvet, a pile weave made of filament fiber with the pile yarn in the lengthwise or warp direction. Frieze Terrycloth, a pile fabric (usually cotton) with uncut loops on both sides. The pile in terrycloth is formed by a special weaving arrangement in which three picks or fillings are inserted and beaten up with one motion of the reed. Common varieties include two-pick and three-pick terries with three-pick one being the highest quality, it has two picks under the pile loop and one pick between loops. Each loop acts as a tiny sponge. Terrycloth's large absorption capacity makes it the fabric of choice for bath towels and bath robes. Filling or weft pile weave Corduroy, a textile composed of twisted fibers that, when woven, lie parallel (similar to twill) to one another to form the cloth's distinct pattern, a "cord." Modern corduroy is most commonly composed of tufted cords, sometimes exhibiting a channel (bare to the base fabric) between the tufts. Corduroy is, in essence, a ridged form of velvet. Velveteen, made of staple fibers (often cotton) with the pile yarn in filling (cross-wise) direction. See also Textile manufacturing terminology References External links Woven fabrics Weaves