The 7AM Blanket 212 Evolution is a cozy, sleek sack offering 3 layers of cold protection during the winter season. This cover is adjustable in length and width, allowing comfortable use from 6 months to 4 years. Multiple integrated hook and loop attachments and its universal 5 point harness loops enable compatibility with any stroller. This sack is car seat compatible, too, by eliminating the anti-slip back panel.