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 ankle, and reflective details for when you’re running in cold weather. The adjustable bonded waistband is complemented by plenty of storage space, 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.