Under Armour ColdGear is a proprietary technology used in Under Armours cold-weather gear. It is designed to keep athletes warm with a lightweight fabric that sits next-to-skin, while still keeping the bodys core temperature warm. ColdGear is made of a double-layer fabric that helps to wick moisture away from the wearers skin and circulate body heat, allowing for high levels of warmth without added bulk that can slow you down. Under Armour has done extensive research to understand how much and what type of stretch is needed for different areas of the body to keep the fabric in place, as well as comfortable and supportive. ColdGear is ideal for conditions between 55 degrees Fahrenheit and below, and it is used on the brands compression, thermal, and fleece apparel. Under Armour ColdGear is the optimal “second skin” for cold weather workouts, and it aims to help the body maintain its internal temperature while still feeling comfortable when worn.