About This All-Season Comfort: Designed for year-round comfort, the MORI Baby Clever Sleep Sack provides the ideal warmth and breathability, adjusting to various seasons with its 0.5 to 2.5 tog rating. Signature Organic Fabric: Showcasing MORI's unique blend of 30% organic cotton and 70% from viscose, this sleep sack ensures the ultimate softness while being thermoregulating to maintain the ideal body temperature overnight. Hassle-Free Night Changes: Featuring a double-direction zipper and side shoulder opening, enabling quick and easy nighttime changes. This design ensures minimal sleep interruptions, making it convenient to change diapers. Safety-Focused Design: With a snug-fitting neck and armholes, the chance of slipping is reduced. Nickel-free snaps at the armholes offer added security, especially for tinier babies, ensuring they stay safe and comfortable all night. Travel-Ready Convenience: With a unique stroller belt opening, this sleep sack ensures your baby stays peaceful even on the go. For safety, it's recommended not to use with padded clothing in car seats; instead, adjust the car temperature or place a blanket over harnessed straps.