Formerly known as the Hercules Jacket. Ideal as mid-layer insulation; pill-free, highly breathable, high-loft, insulated jacket. Formerly known as the Hercules Jacket-Adding more power to the insulation battle, the Hyllus flexes its hi-loft muscle to save the day. A comfy, long shag fleece on the inside snares body heat and the incredible breathe-through capabilities of the smooth outer face keeps moisture under control. Delivering great mid-weight insulation, Hyllus, son of Hercules, is a modern hero.