Under Armour Women's Ua ArmourVent Moxey L/S 100% Polyester Imported Machine Wash 4.6 oz. 100% polyester fabric. Iso-Chill Cooling Technology features yarns with increased surface area that help dissipate heat from the body, creating a cooling effect. Hydro Armour water-fighting technology is quick drying, and chlorine and salt resistant. UPF 30+ sun protection. HeatGear ArmourVent provides strategic ventilation.