Stay warm when trekking outside during the winter months with silk long underwear, Long Johns and base layers for women at Appleseed's. When temps drop, keep your body well insulated with long underwear tops including, long and short sleeve shirts, tanks, and turtlenecks. For your legs and bottom, our silk pants and leggings will keep you toasty. Even built your own long underwear set. Choose between three level of warmth—lightweight, miweight and heavyweight to find the insulation right for you.