The North Face Thermoball Vest - Men's Power Green X-Large Packable/Stowable - Highly-compressible layer for emergency use or travel Quilted thermal vest insulated with packable, ultralight ThermoBall is an ideal mid-layer on wet, cold days ThermoBall powered by PrimaLoft synthetic insulation has the warmth equivalent of 600-fill down Fabric: 100% nylon - bluesign approved Weight: 260g / 9.17oz