Kelvin AeroLite Vest weight: 9.6 oz. Great shape. No flaws. Synthetic PrimaLoft® Gold Insulation with Cross Core™ technology replicates the warmth and compressibility of down, but with the benefit of warm-when-wet performance Lightweight insulation (35% recycled) is infused with silica aerogel, a nearly weightless material that’s composed of more than 95% air and acts as additional thermal insulation Deep, zippered chest pocket safely stores your valuables