Streamlined ThermoBall® powered by PrimaLoft® baffles are contoured to fit your body and maintain core warmth during winter excursions in cold, wet weather. Wear this thermal vest as a mid-layer for added warmth in the coldest winter days or pack it for emergency layering in the backcountry. 15D 33 g/m2 100% nylon with durable water-repellent (DWR) finish|11.5 g/ft2 PrimaLoft® ThermoBall® synthetic insulation|Secure-zip hand pockets|Stows in left hand pocket|Hem cinch-cord|Contrast embroidered The North Face logo on left hem and right back shoulder|DURABLE WATER-REPELLENT: DWR is applied to the face of the fabric to provide the first line of defense against wet weather.|INSULATED: Insulation traps hot air for reduced heat loss and increased warmth.|PACKABLE/STOWABLE: Highly compressible layer for emergency use or travel. SYNTHETIC: Designed to replicate the qualities of down, but retain them even when wet.