The ATO – Alpine Terrain Operations™ Mid Loft Pant is designed to provide warmth and wind protection when static while avoiding overheating during movement. Constructed with a durable wind resistant nylon fabric that is lightweight and packable. The Polartec® Alpha® Direct insulation is a uniquely constructed knit that does not require a lining layer, reducing the overall bulk but maintaining a high CLO value. The insulation is also highly breathable and designed to allow excellent ventilation during high activity in cold temperatures. It features an adjustable waist, glove compatible zippers, and pass through hand pockets to access under layers.