Officially Licensed US Air Force Product Armour Fleece is light, breathable & stretchy for warmth that still lets you move Soft inner layer traps heat to keep you warm & comfortable Scuba neck hood for added coverage with drawcord adjust Loose: Fuller cut for complete comfort. This US Air Force Under Armour Fleece is our original performance replacement for old-school fleece. It's light, incredibly warm, and has just the right amount of stretch.