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Water Vapor Permeability (WVP) through fabrics has a significant effect on the thermo-physiological comfort of the human body by avoiding the perspiration remaining next to the skin. In order to provide wearing comfort to the wearer, textile materials should have high capacity of water vapor permeability so that perspiration can evaporate and be transmitted from the body surface to the environment even at extreme weather requiring wind and rain proof. Shape memory polyurethane (SMPU) could possibly be candidates of smart textile material in the coming decade for meeting such requirements. SMPUs used in this study are thermal or/and moisture induced materials and their coated cotton fabrics could provide thermal insulation with lower permeability at low temperature or low relative humidity and high permeability at room temperature or above or high relative humidity. In addition to the stimuli-responsiveness, it is found that the WVP increased with the decrease of coating concentration and more responsive to temperature or relative humidity to the SMPU coated fabrics. In this paper we have proposed, segmented shape memory polyurethane for coated textile in order to have waterproof, breathable textile with good water vapor permeability properties. [ABSTRACT FROM AUTHOR]