For ultimate warmth in all weather conditions, The North Face ThermoBall Vest can't be beat! Midweight 100% nylon ripstop fabric is packed throughout the body and collar with 9.5 grams of PrimaLoft ThermoBall synthetic insulation, which is just as compressible as down yet insulates even when wet. The ThermoBall Vest features a mock-neck collar, exposed molded-tooth center-front zipper, zip-secure hand pockets, and a hem cinch cord for easy fit adjustments. The vest stows easily in its own hand pocket for convenient transport. Active fit. Imported.