The North Face says about the Sarnen GTX Triclimate
Our Sarnen GORE-TEX® Triclimate 3-in-1 Jacket is built to keep you warm and dry on all your hiking adventures. Featuring unbeatable GORE-TEX® waterproofing technology on the outer jacket and ultra-warm synthetic insulation on the inner jacket, it’s designed to help you push through to the end of the trail in comfort – however bad the weather gets. You can wear each jacket on its own or both together for that sweet-spot combination of warmth and wild weather protection.