Get through your baby's first winter with ease with the help of the Patagonia Infant Boys' Micro D Crew. Cold-weather dressing is easy with a versatile top that he can wear as a light layer over his cotton one-piece or a cozy baselayer under a jacket. Come bedtime, the Micro D crew makes an extra-warm but breathable pajama top that helps him get a good night's sleep in a cool room. Who knows, maybe he'll sleep through the night .... but miracles aren't guaranteed.