NWT ELLA'S WOOL Baby Base Layer Set, 12-18 months 100% pure merino wool. Warm base layer set with one merino wool onesie and one pair of merino wool pants Made from soft, non-itchy 100% pure Merino wool 21.5 microns (babies are less active so these thermals are warmer than usual) Available in light pink, navy blue, moss green, and marl-gray Keeps babies warm even when damp