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Our Cold Weather Lightweight Thermal Undershirt is an unissued military surplus cold weather undershirt. Designed for soldiers on the move in cold weather conditions these undershirts are ideal for outdoor sports or work activities. Using this thermal undershirt as a base layer will give you a good foundation to fight the bitter cold and the lightweight design will ensure you stay comfortable as well. Combat tested and battle proven, let this undershirt ensure you stay on top of the cold weather in your area of operations.