The Ollie World Alphie Sleep Pouch (Sky), Made from Custom Patented Moisture-Wicking Fabric, 2-way Zipper, Sleep Sack, Wearable Blanket, Swaddle Transition, 4-12 Months Custom Moisture-Wicking Fabric – Keeps baby cool, dry, and comfortable by pulling moisture away from the skin to reduce the risk of overheating. Two-Way YKK Zipper with Oversized Garages – Opens from top or bottom for quick, stress-free diaper changes and stays securely in place all night. Extended Size Range (4M–5T) – Grows with your child from baby through toddler years, ensuring consistent sleep cues at every stage. Neck- and Face-Safe Design – Innovative neckline prevents fabric from riding up, adding an extra layer of safety beyond standard sleep sacks. OEKO-TEX Class I Certified – Free from harmful substances and gentle on delicate skin, safe for even the youngest sleepers. The Ollie World Alphie Sleep Pouch (Sky), Made from Custom Patented Moisture-Wicking Fabric, 2-way Zipper, Sleep Sack, Wearable Blanket, Swaddle Transition, 4-12 Months