It's the insulated jacket you can actually work out in. That's because the insulation adapts to your activity level, so as you heat up, it lets out warmth.
Manufacturer
Under Armour Europe B.V., Stadionplein 10, 1076 Amsterdam - NL https://privacy.underarmour.com/s/article/Contact-Us?language=en_US#:~:text=If%20you%20have%20any%20feedback,Terms%20and%20Conditions%20of%20Use%E2%80%9D.