The Zeroweight Warm Running Pants 2.0 are now made entirely from recycled materials – featuring a waterproof and windproof softshell fabric on the thighs and a warm, ultra-stretchy material on the lower legs and back. They include laser-cut ventilation zones, zippers at the bottom of the legs, and reflective details for when you're picking up the pace on cold days. The adjustable taped waistband is complemented by plenty of storage, including a zippered key pocket and two trail-running-inspired mesh pockets. With these warm and weatherproof running pants, you'll be ready to head out even when you don't feel like it.