The Backcountry Highliner PrimaLoft Air - Perm Fleece 1 / 4 - Zip is built for high - mountain adventures and year - round exploration. Whether we're hiking ridgelines or transitioning back to town, this lightweight pullover delivers breathable warmth and packable convenience. Constructed with PrimaLoft Active Evolve fleece, this layer is made entirely from polyester, offering a thermoregulating system that wicks moisture and keeps us comfortable. The stretch - knit fabric moves with us, and integrated thumbholes provide extra coverage for changing weather. When it s time to shed a layer, the Highliner packs neatly into its hidden neck pocket for easy carry and quick redeployment.