90% Polyester + 10 % Spandex Well-chosen Breathable Fabric-Soft and comfortable to wear; Lightweight, stay cool, quick moisture wicking to keep you dry, offering you healthy care. 360 Degree Stretchy to support larger chestline and suggest to be a slim fit to show your muscular body perfectly. Reflective bars keep you bright in low light, effectively protects your safety of your evening activities. Seamless Workout Hooded: It is perfect when you need just a little warmth,not too thick,and not too thin for all season long. Wide Application- Perfectly suitable for gym, yoga hall and other occasions, also ideal for outdoor sports like Fitness, walking, running, climbing, cycling, etc.