File this Serena & Lily favorite under "things no new mom should be without." Designed to attach to the stroller or car seat, this insulated sack keeps baby cozy in all kinds of weather. It accommodates a five-point harness, and the detachable hood and snap-in blanket keep baby comfy in any weather. One outer pocket tucks away little necessities like keys or a pacifier. Finished with a soft cotton lining and a water-repellant shell.