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.The AMK L1 Pant makes up the base of your clothing system. Its DotFleece has a hydrophobic inner, hydrophilic outer and strategically engineered holes throughout. This pulls moisture from the skin and expels it to the outside of the garment for crucial temperature control. Slim fitting for minimal bulk under your clothing system, it\'s the ultimate alpinist base layer.