Under Armour Women's Ua Iso-chill Remi Tank Imported Machine Wash 3.68 oz. 100% nylon fabric. Built with Hydro Armour water-fighting technologies so it's quick drying and chlorine/salt resistant. UPF 30+ sun protection. Heathered Iso-Chill cooling technology; made from yarns with increased surface area that help dissipate heat from the body, creating a cooling effect. ArmourBlock neutralizes odor-causing microbes to keep the shirt smelling fresher longer.