【Soft OEKO-TEX Certified Bamboo Fabric, 1.5 TOG for 20–23℃ Rooms】Made from breathable, cloud-soft bamboo fabric certified to OEKO-TEX STANDARD 100, ensuring it is tested for harmful substances and safe for delicate baby skin. The 1.5 TOG rating is ideal for room temperatures between 20–23℃, making it a versatile choice for year-round indoor use while helping keep your baby cosy without overheating. 【IHDI-Inspired Hip-Friendly Design】Inspired by hip-healthy principles recommended by the International Hip Dysplasia Institute (IHDI), this sleep sack features a roomy lower shape that allows natural leg movement and a comfortable sleeping position, while the upper body stays gently secure for peaceful sleep. 【Adjustable Fit That Grows with Baby】The Snapfit design keeps smaller babies snug and can be opened as your baby grows, offering extra room to stretch and move. Suitable for 0-6 months, helping reduce the need to size up frequently. 【Two-Way Zip for Easy Night-Time Changes】A smooth two-way zip allows quick nappy changes from the bottom without removing the whole sleep bag, helping keep your baby warm and settled during night-time routines. 【Gentle Neckline for Everyday Comfort】The softly scooped neckline and smooth seams sit comfortably around the neck without rubbing or feeling tight, supporting relaxed and undisturbed sleep.