Industrial fabrics consist of woven or non-woven cloth made from natural or synthetic materials. They are produced by weaving, knitting, braiding, or extrusion. Industrial fabrics can also be needlepunched, formed from a slurry (wet laid), or produced in other ways. The properties of an industrial fabric depend upon the manufacturing process, fiber material, and fiber size. Basic product types include: nonwoven fabrics, sleeves or wraps, blankets or batts, woven fabrics, knitted fabrics, carded or needlepunched non-wovens, and braided fabrics. Nonwoven fabrics are textile- or fiber-based materials shaped into mats of randomly-oriented fibers, felt, needlepunched cloth, spun bound, or meltblown structures. Sleeves or wraps are flexible, fibrous refractory products for insulating pipes, tubes, ducts and other process components. Blankets or batts (batting) are made of thick layers of woven and/or non-woven fabric sheets. Woven products are used for composite tooling and the formation of structures. Knitted fabrics consist of continuous fibers that are processed into a knitted structure with either two or three dimensions. Carded and needlepunched non-woven fabrics offer very high loft (low density) at a very low cost. Braided fibers are used for tubular composite structures, thermal insulation, and in other applications. Specialized industrial fabrics are also commonly available.