Part of Muddy's all-new assortment of hunting apparel and accessories, the Nucleus Heated Quarter-Zip boasts three heat settings-low, medium, and high-allowing wearers to choose the level of warmth that best meets their needs on each hunt, so they're better equipped to outlast lengthy sits. Based on the setting selected, two heating elements across the back of this next-to-skin base layer radiate warmth generated by the single 10,000mAh battery, warming you from the inside out. To adjust the warmth level, simply press the conveniently located power button on the chest. The low-fitting, A 1/4-zip collar delivers added breathability and eliminates worry over bunching when layering up against cold, late-season conditions. Raglan seams are strategically placed throughout, allowing for a full range of motion, regardless of the weather late season dishes out.