Designed for newborns (0-3 months), the aden + anais essentials snug swaddle recreates the secure and cozy feeling of the womb while helping to prevent the startle reflex from waking baby, ensuring a sounder sleep. Plus, it eliminates the need for loose blankets in the crib for a safer sleep. The snug swaddle's two-way zipper allows for diaper changes without unswaddling baby, and it easily converts to an arms-free option should your little one prefer it.