When the temperature drops, a pair of insulated trousers makes all the difference. Perfect for a variety of outdoor activities. This model is made of Pertex Quantum®, a lightweight and crack-resistant recycled shell fabric that is insulated with Mimic SILVER, a recycled polyester foil insulation with an excellent warmth-to-weight ratio. Long side openings with zippers make it easy to take off or on without taking off the shoes, and an elastic waist helps ensure perfect fit.