Be prepared for the cold this winter when you wear one of the PolarSeal Smart Heated Tops. Intelligently designed, this smartwear features integrated heating zones in the back to keep you warm and cozy. With a touch of a button, you can crank up the heat to make any winter wonderland seem like an oasis. The PolarSeal Top has two buttons on the left sleeve where you can select one of three heating levels. Low brings the heating zones to 104F, medium is 113F, and high is 122F. With just a glance, the buttons indicate which level you’re on. In addition, the buttons even work when you’re wearing gloves. Power it all is a massive 10,000 mAh power bank. Even on the highest temperature setting, the PolarSeal Top will last for a whopping 8 hours. However, the shirt uses a built-in USB plug so you can swap out the battery.