When you want an extra layer of thermal comfort for hiking and trekking in the mountains, pack a Puez Melange 2 Polarlite Women's Full-Zip fleece. Made of Polarlite, SALEWAs proprietary fleece with a soft, warm waffle reverse side that traps heat and packs down small. The ergonomically shaped gusseted sleeves and comfortable flat lock seams offer good freedom of movement and the womens specific athletic fit layers nicely under a shell.