ODLO Junior Fitted Baselayer SetsDesigned to protect themselves from the cold all winter long, this technical jersey & tights base layer set will allow the most intrepid youngsters to stay warm and in great comfort, from head to toe, wherever their adventures take them. lead. Made from a highly breathable and quick drying polyester, the brushed inner surface provides an extra layer of thermal insulation and improves moisture regulation, while being very comfortable against the skin.