Key Features

• -【🌡️ Smart Temperature Balance – Cool, Dry & Comfortable All Night】Infused with advanced Outlast technology (originally developed for NASA), this lightweight sleep sack helps regulate your baby’s body temperature by absorbing and releasing excess heat. Designed for warmer nights, it keeps your little one cool, dry, and sweat-free—so you sleep better
• -【🌞 Lightweight Short Sleeve Design – Made for Warm Weather】Designed with short sleeves and a lighter construction, perfect for summer and warm indoor environments. No extra layers, no overheating—just the right amount of coverage to keep your baby comfortable all night long
• -【☁️ Gentle, Airy & Breathable 2-Layer Fabric】Made with an excellent 2-layer cotton blend (55% cotton, 45% Outlast viscose), this sleeping bag is lighter and more breathable than traditional multi-layer designs. It feels ultra-soft on delicate skin while allowing maximum airflow to prevent overheating—perfect for warm sleepers and sensitive skin
• -【👶 Freedom to Move – Built for Active Sleepers】The ergonomic legs design gives your baby full freedom to kick, crawl, and move naturally while supporting healthy hip development. A smooth 2-way zipper makes diaper changes quick and easy, while the zipper guard helps prevent irritation and scratches
• -【🧼 Easy Care, Long-Lasting & Perfect Gift】Crafted from soft, breathable muslin that remains gentle on your baby’s skin wash after wash. Durable, machine washable. Available in 4 sizes (S to XL) to grow with your baby. A thoughtful gift for new parents and an essential for keeping baby cool and comfortable in warm weather
• -💡 Since every baby grows at their own pace, we recommend measuring your baby’s height and weight before purchasing, and then selecting the right size sleep sack based on those measurements (age recommendations are for reference only). If you have any questions before or after your purchase, don't hesitate to tell us. Thank you for choosing i-baby!