The North Face Summit Series Women's L2 Jacket is a fleece midlayer for a secondary warmth layer. The 2 means you put it on second, next to your base layer. The fabric is Polartec® Hardface® fleece, durable exterior and warm against the cold temps. The zippered hand pockets are placed higher up, so they won't be uncomfortable underneath your harness and the zippered chest pocket keeps additional small items close by. Throw on the hood to keep head and ears warm, it'll fit right under your helmet so you can remain safe on the mountain.