【High-Function Material】 Utilizing ColdGear technology, this item keeps you comfortable even in cold environments. 【Excellent Fit】 The compression style fits the body, providing ease of movement. 【Versatile】 Perfect for outdoor activities and sports, and suitable for layering. - Brand: Under Armour - Color: Navy - Material: Polyester - Model Number: ColdGear - Style: Compression Wear Size is S/M (US size / Japanese M). As you can see, there is some wear and tear. The heat retention function remains unchanged.