CoreTech Bags are designed to keep your body's core at a more comfortable temperature. Includes a third layer of “Ultra Compactable Siliconized Air Core fill” in the chest area of the bag. Keeps warm air in and locks cold air out. The heat generated by your core will circulate through your body for ultimate comfort and performance. CoreTech Bags are designed to use the insulation in the most efficient manner possible by putting the insulation where your body needs it most. Rip-stop polyester outer. Fully adjustable tapered hood, full chest bafﬂe, zipper guard to keep zipper from catching fabric and insulted draft tube keeps cold air out. Bag measures 86" x 36" x 24". Full barrel foot.