We designed the Zelkii Bamboo Sleep Sack – Fawn focused on the biggest worries of parents. Is it safe? Is it comfortable? Will nappy changes be a nightmare? This is our answer: a premium quality sleep solution for your baby or toddler that checks every box. First, comfort. Our signature bamboo fabric is buttery-soft and breathable, making it ideal for sensitive skin. Its best feature? It's thermo-regulating, which helps keep your baby or toddler at a consistent, comfortable temperature all night—no more worrying about them overheating. Next, practicality. We use only the world-renowned YKK zipper. This two-way zipper glides smoothly, won't snag, and makes those middle-of-the-night nappy changes quick and fuss-free, all without waking your sleeping child. Finally, safety. For your ultimate peace of mind, our Zelkii Bamboo Sleep Sack – Fawn is Oeko-Tex Standard 100 certified. This is a high-level, independent certification that proves it is 100% free from harmful chemicals and toxins, making it one of the safest garments you can put next to their skin. Key Features: Silky-Soft Fabric: Made from 95% bamboo viscose and 5% spandex for the perfect blend of softness and stretch. Oeko-Tex Standard 100 Certified: Proven to be safe, non-toxic, and gentle on delicate skin. Premium YKK Zipper: Features a two-way zipper for easy changes, plus a zipper garage for added protection. Thermo-regulating: Bamboo's natural properties help keep your baby or toddler cool in summer and warm in winter. TOG Rated: 1.0 TOG-rated.