100% Cotton Imported 【Right Size → Cozy ZZZ】Please refer to the size chart image and use baby's weight to select sizes. Size Size S – Ideal for babies weighing 10-18 lbs, aged 0-6 months, and baby's height 23-27 in. Size M – Ideal for babies weighing 18-24 lbs, aged 6-12 months, and baby's height 27-31 in.The right size will ensure comfortable snug, proper neckline and good hip movement. 【Hassle-Free Swaddle for New Parents】Designed by ingenuity to transition from swaddle to sack, the baby swaddle with wrap offers three convertible wearing choices. Adjust the swaddle for arms-in to reduce startle reflex, hands-up to face for self-soothing, or arms-out to transition to sleep sack, meeting the needs of babies at different stages of development 0-6, 6-12 months. 【Calm Startle Reflex & Simple Night Diaper Change】This amazing swaddle sleep sack features 2 large adjustable wings, self adhesive hook-and-loop fasteners like magic, maintaining a secure, no-shift wrap to reduce startle reflex. Ideal as a hand free newborn swaddle with two-way reverse zip design, it makes night diaper changes simple and silent without distubing sweet dreams. 【Natural Skin-friendly Material & Suitable for Different Scenarios】Crafted from breathable cotton with no synthetic blends, this lightweight swaddle sleep sack is gentle, and suitable for sensitive skin. It ensures a cozy and comfy sleeping environment for your little one at Temp 68-75°F (20-24°C). With adjustable swaddle for temperature regulation, it's versatile for nighttime sleep, daytime naps, and both at home and on the go. 【Ideal for Gifting】Certificated with sustainability feature OEKO-TEX STANDARD 100, this wearable swaddle is best for baby shower gifts, registry must-haves, and hospital bag essentials. Suitable for newborn boys and girls, this baby sleep sack makes a perfect cotton swaddle for new borns to 12 months. Use as a baby sleep sack, infant wearable blanket or baby pod sleep sack. It's baby-safe, eco-conscious, and parent-approved. LILBESTIE Baby Sleep Sack Swaddle | 3-in-1 Wearable Blanket for 0-12 MonthsTired of frequent night wakings due to your baby's startle reflex? Struggling with the transition from swaddle to sleep sack? Discover the LILBESTIE newborn swaddle sack, the smarter way to help your baby sleep safer and longer.Why Moms and Babies Love Our 1.0 Tog Sleep Sack:  Our swaddle's secure, hug-like design helps calm your baby's startle reflex, reducing sudden awakenings. Enjoy more restful sleep for your little one and your entire family.This versatile wearable blanket grows with your baby. It features three adjustable positions: Arms In for a secure swaddle, arms out for freedom of movement, and hands to face for self-soothing. It's the perfect solution for transitioning from swaddles for newborns to a sleep sack. Made from high-quality, gentle cotton that’s kind to your baby’s skin. The fabric is breathable, machine-washable, and built to last. This breathable material helps maintain a comfortable temperature for year-round use. This baby swaddles feature a two-way zipper that makes it easy to remove the diaper without having to completely undo baby's wrap, while the soft zipper guard protects baby's skin.Specifications:Material: 100% CottonTog Rating: 1.0 (Ideal for 68-75°F / 20-24°C)Available Sizes: 0-6 Months & 6-12 MonthsIdeal For:A smooth and safe transition from traditional swaddlesThe perfect gift for baby showers, birthdays, and holidays