It used to be that the rigid temperatures of fall and winter meant the only way to continue your training was to either layer up bulky sweatshirts or head indoors. Times sure have changed. The top fitness brands have developed innovative tech that’s changing the way we look at the thermometer. Now, you can train outside whenever you want.

Under Armour ColdGear Infrared

This is about as technical as it gets. Under Armour experts actually used infrared imaging to detect the areas where heat loss occurs. But how does it work? To combat the heat loss, ColdGear Infrared actually absorbs and insulates your body heat, trapping it within the confines of your gear. The retention of your natural heat keeps you warmer, longer. That’s not even the best part. If you have ColdGear Infrared, you don’t have to bulk up with layer upon layer. One lightweight layer is all it takes to make the next cold weather workout your best session yet. Shop UA ColdGear Infrared at eastbay.com.

Under Armour ColdGear Infrared

Nike Sphere

Now this is cool (or hot). Nike Sphere tech is warming and cooling, but it doesn’t make you too warm or too cool — it keeps you just right. This fabric is designed for thermal regulation, so no matter how hard you push yourself during a workout, you won’t overheat. It’s made up of breathable microfiber that locks in heat to keep you warm, but promotes air flow so you’re not too warm. And like the UA ColdGear Infrared above, it’s sleek and lightweight, so one layer is all you need. Shop Nike Sphere at eastbay.com.

Nike Sphere