Elastic garments have tremendous scope in the field of tight-fit sportswear and healthcare application. Research towards improvement in the elasticity of fibre, yarn and fabrics and development in testing methods for elastic garments is the current requirement for the industrial product development. This proposed book is about the elastane fibre, elastane yarn and fabric production methods, new attempts in yarn production, commercial ways of fabric manufacturing techniques and the fabric properties, new testing methods to test the elastic products and their application of elastic garments in sports and healthcare.