The North Face's top athletes are usually decked out in the Summit Series whenever they're exploring the world's extremities, so you know you can rely on the Men's Summit L5 FuseForm GTX Performance Pant when you're backcountry touring or ski mountaineering. This pant boasts a Gore-Tex Pro membrane for reliable waterproofing and the amplified breathability needed to stay comfy on skin tracks. The North Face's innovative FuseForm technology seamlessly combines different fabrics in key areas to keep durable where needed and light and breathable where wanted. A thin, three-layer construction makes the pant lighter and more compact for easier packing on long mountaineering missions.