Tufted carpets have a reputation for being sturdy and wearing well over long periods of time. Tufts are essentially clusters of yarn fibres that are drawn through some sort of medium, such as a natural fabric or a synthetic base. The tufts project from the surface of the base, and may be configured as a loop or cut strands. In other words, these carpets have their pile injected into a backing material, which is itself then bonded to a secondary backing comprising a woven hessian weave or a man made alternative to provide stability. This is the most common method of manufacturing of domestic carpets for floor covering purposes in the world and they are particularly popular in North America. Tufted carpets tend to absorb sound. Most of these carpets are tufted with acrylic or a mix of acrylic and wool. However, there are hand tufted carpets in the world market made of pure wool only. Most hand tufted carpets today are made in Belgium, China and India.