MATERIALS & CERTIFICATION: 100% Australian Merino wool lining (origin: Australia) and 100% cotton outer; Oeko‑Tex Standard 100 certified, free from harmful chemicals. TEMPERATURE CONTROL & COMFORT: Merino wool is naturally breathable and temperature‑regulating for all‑season use—keeps baby warm in winter and cool in summer, helping babies (and parents) sleep better. UNIVERSAL SIZING & USAGE PERIOD: Universal design — Classic Sack Mode (Keeps baby cozy & secure) fits 2–24 months; Legs‑Out Mode (Freedom of Movement) fits 2–36 months, extending the product’s usable life. HIGHLY PRACTICAL: Double shoulder snaps and a two‑way zipper for easy dressing and diaper changes; closable seat‑belt slots for transfer to stroller/bouncer/crib; under‑arm snaps let the product grow with the baby as a swaddle transition. BRAND & AFTER-SALES: HECCEI offers premium workmanship and materials, backed by professional customer service and an industry-leading warranty for added peace of mind. GIFT‑WORTHY PACKAGING: Comes in a pretty gift box—ready to give. Perfect for Christmas, Thanksgiving, Easter, New Year’s, the 4th of July, baby showers, newborn gifts, first birthdays, or a baby’s “first” holidays. Give your little one the gift of cozy, comfortable sleep with this premium HECCEI sleep sack. Crafted from a thoughtful blend of merino wool and cotton, this sleeping bag adapts naturally to your baby's temperature needs across all seasons. The versatile design grows with your child, making it an ideal choice from 2 to 24 months. Perfect for nighttime sleep and daytime naps, this wearable blanket keeps your baby snug while allowing freedom of movement. The natural fiber blend offers breathability and comfort, helping maintain optimal sleeping temperature whether it's warm or cool. The practical design makes diaper changes easier while keeping your baby securely covered throughout the night. This sleep sack combines style with functionality, making it a smart choice for parents who value quality sleep solutions for their little ones.