Introducing Advanced Mountain Kit. The most sophisticated alpine climbing system The North Face has ever created. A specialist series, AMK incorporates apparel, accessories, and equipment. Collaborating with elite athletes, designers, and innovators, the collection redefines high mountain performance. Rethinking the needs of the world\'s best, Advanced Mountain Kit enables alpinists to push the limits of their potential.Worn over your base layer leggings, the AMK L2 Pant provides vital warmth. Made with TNF\'s FutureFleece technology, the performance fabric achieves an optimal warmth-to-weight ratio. A high-pile lofted backer helps to trap the heat, while the smooth face aids layering.