These fitted cut thermal tops provide a comfortable warm base layer with unparalleled wicking ability. The Prime Winter layer utilises Thermal Grid Tech™ technology scientifically designed to retain warmth. OdorKILL™ and Scent Shield™ technology which kills the bacteria that causes odor, keeping your Prime Layer more comfortable for longer. Scent Shield™ technology is a scientifically advanced feature that helps block your scent from reaching your prey.