| Windproof yet highly breathable. Warm yet lightweight. Water resistant with stretch. THE ONE™ Women's Vest features KÜHL’s temperature-regulating AERO™ KNIT technology for breathable comfort and core performance. There is only one! Fabric 100% Nylon AeroKnit™ | 100% Polyester 83% Nylon, 17% Spandex Insulation 100% Polyester |