When the rut winds down and the mercury drops, the sits get longer, and the margin for error gets thinner. The ScentLokA(R) BE:1 Trek Heated Base Shirt is built for those December mornings, layering Carbon AlloyA(R) odor-adsorption technology against your skin so you seek out and destroy odor at the source, then adding on-demand heat so the cold never ends your hunt early. Carbon AlloyA(R) is the treated-carbon system proven in the lab, and it reactivates in the dryer sit after sit. Silver Alloy(TM) helps inhibit the growth of bacteria, a smooth poly/spandex face layers clean under the rest of your kit, and a micro fleece inner lining holds warmth close. Three heating pads (two front, one rear) put heat where you feel the cold first, while a quarter-zip and a 2-inch collar let you dump heat on the walk in and lock it down once you are set. Staying undetected and staying in the stand is how close-range setups turn deadly. This base shirt is built to do both. Power bank sold separately. Carbon AlloyA(R) for maximum odor adsorption Silver Alloy(TM) helps inhibit the growth of bacteria Smooth poly/spandex outer fabric for easy layering Micro fleece inner lining for warmth Quarter-zip design for easy dressing and venting 2" collar to keep warmth in and wind out Three heating pads (2 front, 1 rear) for warmth 7.4V/3A DC power bank sold separately