In recent years, a kind of yarn called as core-spun developed to give different properties to textile products. Core-spun yarns are widely preferred in the production of denim fabrics with high stretching or stretch properties, as well as textile products where high strength, conductivity and strength are required. Core-spun yarns consist of covering continuous core filaments such as elastane, PES, PA etc. with staple natural/synthetic sheath fibers. In recent years, a new type of core-spun yarn called as dual-core has been developed to eliminate a number of problems arising from the high recovery property of elastane and to improve the recovery behavior of denim fabrics. In this study, it is aimed to investigate the effect of yarn count, weft density parameters and the interaction of these parameters with the various performance characteristics of the fabrics obtained from these yarns after dyeing and finishing processes. In present study, woven fabrics with three different weft densities were obtained by using T400/elastane dual-core yarns having three different yarn counts and various properties of the fabrics related to mechanical (breaking, tearing and seam strength), performance (fabric elasticity, permanent elongation, abrasion and pilling resistance, dimensional stability) and comfort (air permeability and bending resistance) were determined. The results of the woven fabrics showed that production variables of the dual-core yarns and woven fabrics had considerable influence on these fabric properties.