Based on the popularity of the Chameleon concept (two products in one), the new Chameleon Prima features the same detachable sleeves that allow you to have a jacket or a vest, but is filled with 100% PrimaLoft® synthetic insulation. PrimaLoft® consistently delivers warmth and comfort event when wet. It is also very light and durable making it a great match with the durable and breathable Hitex (Nylon Ripstop) 15D shell that features an improved DWR (Durable Water Repellent) treatment that is more resistant to washing so it maintains its excellent water repellency over time. A lightweight hidden hood, inner and outer pockets and a special Stow-Away Pocket (self-contained packing pockets standard on our Essential outerwear) round out the features on this incredibly high-end jacket … vest … which one is it?!