100% Polyester Imported AWARD-WINNING, HOSPITAL-TRUSTED DESIGN — The original HALO SleepSack Swaddle is used by over 1,800 hospitals and trusted by 30+ million parents for safer, sounder sleep. VERSATILE 3-WAY ADJUSTABLE SWADDLE — Adjustable wings allow swaddling arms in, hands-to-face, or arms out, adapting to your baby’s growth and preferred sleep style. WARM AND COZY MICROFLEECE — Made with soft microfleece and rated TOG 3.0, this swaddle provides safe, snug warmth in cooler nursery temperatures (61–64 °F) without extra layers. DOUBLE ZIPPER FOR EASY DIAPER CHANGES — Two-way zipper opens from the bottom for quick nighttime diaper changes without removing the swaddle. HIP-HEALTHY AND SAFE DESIGN — Recognized as “Hip Healthy” by the International Hip Dysplasia Institute, the HALO SleepSack Swaddle features a roomy, sleeveless design that allows natural movement and supports healthy development.