N ANO technology has been a core of many research work for the past fifty years. Applications of nanotechnology in textiles field have increased such products value, and made these textiles as a very important part of smart inventions. Durability, comfortability, hygienic properties, UV protection, energy saving and many other properties have been achieved through using the application of nanoparticles in textiles weather through coating or encapsulation or other methods. (PANI)/polyacrylonitrile (PAN) nanofibers, silver nanoparticles, single/multi-walled-nano carbon tubes (SWCNT/MWCNT) and Ag, Au and Cu nanoparticles have been used in smart and smart wearable textiles such as stretchable textiles and wearable solar textiles, triboelectric nanogenerator and one-piece self-power/self-charging power textiles. Smart wearable textiles are a result of the combination between nanotechnology and smart textiles which will be the next trend of textiles research.

N ANOTECHNOLOGY became a core of many research works specially in textiles field as it is being applied to obtain such effective properties that were not exist until its applications in smart textiles. The development of fibers spinning techniques have created a relationship between the geometrical parameters of yarns and performance properties of the resulted fabrics. Fabrics woven using compact cotton yarns found to have better UV protection and water-vapor transmittance than those of combed yarns. The compactness, evenness and low hairiness of such yarns have created an integrated structure that enhanced fabrics UV protection and water-vapor passage through fabrics. TiO 2 NPs have improved total fabrics performance specially for UV protection, while samples of compact yarns had a better result for both properties.