You've got your puffer coat; they've got Thule's ultra-cozy Newborn Stroller Nest. This cold-weather essential for babies fits into a variety of Thule strollers to create a snuggly lay-flat surface, complete with a head rest for extra support (and on-the-go naps). No need to remove the insert when it's time to stow away the stroller—it can fold right with it.