Nanotechnology has been incorporated into a wide range of garments to improve the durability of clothing / apparel and create new properties for a special end-used application. It also incorporates wearable electronics into clothing to make it smarter. Smart nano-textiles refers to the uses and integration of smart nanocoatings, nanosensors and nanodevices in multifunctional textiles, since they are both low cost and have low power consumption. Various organic and inorganic nanomaterials can be used in garments to improve their properties and create new properties such as anti-bacterial, superhydrophobic, auto-cleaning, self-cleaning, stain repellent, wrinkle-free, static eliminating, fire resistant and electrically conductive properties. This book focuses on the fundamental concepts and approaches for the preparation of smart nanotextiles, their properties, and their applications in multifarious industries, including smart garments, biomedicine, construction/building materials, energy conversion/storage, automotive/aerospace industries and agriculture.