The men’s THERMOBALL Hoodie is built to help you ace your next backpacking trip with durable warmth and high packability. It features 13g PrimaLoft ThermoBall fill in an innovative bottleneck quilt pattern for excellent warmth-to-weight. This synthetic fiber-cluster insulation mimics, trapping warm air to retain your body heat. This entire hooded jacket also packs inside its own zipper stow hand pocket. Be one with the alpine in the slim-fitting ThermoBall Hoodie.