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In the field of textiles, fishnet is hosiery with an open, diamond-shaped knit; it is most often used as a material for stockings, tights, or bodystockings. Fishnet is available in a multitude of colors, although it is most often sported in traditional matte black. Fishnet is commonly worn on the legs and arms by practitioners of goth and punk fashion, but is also commonly worn by the mainstream as a fashion statement. Generally considered to be a sexy garment, it may serve as a component of sexual fetishism. Fishnets are used mostly as a type of undergarment, and in as much as it defines curves by applying a grid close to the body it generally accentuates the wearer's muscular definition.
A more practical use of fishnet textiles is in high performance next-to-skin apparel used in cold weather outdoor sports, including hiking, hunting, fishing, skiing, and mountaineering. In this context, fishnet is usually knitted from fibers of polypropylene, merino wool, or nylon, and offers a number of benefits over traditional densely knitted base layer apparel. These benefits are related to the presence of large void spaces in the fishnet fabric structure that trap insulating air for warmth in cool conditions, and allow for the rapid transport of moisture from the skin surface to outer layers to minimize conductive heat loss.