Model [ NK11017083]Nike Therma-Sphere Men's Training Vest Cool Grey/Anthracite/White/BlackCore Warmth. Effortless Motion.Designed for your toughest workouts, the Nike Therma-Sphere Men's Training Vest helps keep your core warm while offering incredible freedom of movement. Breathable WarmthZoned Nike Therma-Sphere technology uses a 3-D structure to trap warm air close to your body while wicking sweat away. Freedom To MoveA slim, articulated fit and sleeveless design let you move freely, whether you're warming up, training or stretching after a workout. Breathable DesignMesh overlays enhance ventilation, helping you stay comfortable even at the peak of your workout. More DetailsTwo-way zipper offers easy on and off. Fabric: Therma-FIT 100% Polyester. Machine Wash.