How do you improve the perfect pair of maternity leggings? Make them thermal for winter of course. Our black thermal maternity leggings are matte & opaque on the outside with a cosy fleecy finish on the inside. Perfect for winter walks or keeping warm at home. The waistband is flexible & foldable for a comfy fit through pregnancy that works after baby arrives too. Which is lucky, as you won't want to take them off.