Practical & comfortable this progressive swaddling sleep bag promotes peaceful rest & helps to soothe baby whilst they sleep! Use the side flaps to keep baby's arms by their side & prevent rude awakenings from reflex movements. Length adjustable via touch'n'close tabs. Can be worn indoors & outdoors. Suitable from birth up to 14 weeks. We make child safety our priority! This item carries the International Confidence in Textiles label, according to Oeko-Tex Standard 100. This is your guarantee that the product contains no substances which are toxic or harmful to the skin. In quilted jersey: 85% cotton 15% polyester with a pure cotton jersey lining.