What is Pertex from The North Face? Features: This material combines waterproofness and breathability, and is classified as "rainwear" or "hardshell." While having high water resistance, it achieves the lightweight and softness characteristic of Pertex, and its lack of stiffness is appealing. Optimal uses: Rain jackets, waterproof shell pants, waterproof backpack covers, etc. It can also be worn as an outer layer, but if you connect this down jacket as an inner layer with a compatible outer jacket using a zip, you can wear it as a perfect cold-weather garment and further expand your outfit options. Please refer to image 7! #NorthFaceInner #NorthFaceZipInZip #NorthFaceDown