Core 2 PantsRegulating your temperature when youre out on the road is all about layering. When the temperature goes down, layer up. And when the temperature goes up, you layer down. Its as simple as that. With our Core 2 insulating mid layer pants weve really brought the process of effective layering down to its core. Breathable, lightweight, and packable Breathable, lightweight, and packable, theres no reason not to have a pair of mid layer pants with you.