100% woven textured cotton outer with applique and embroidery details * 100% super-soft cotton jersey lining; Machine washable and can be tumble dried on low heat * 0-6 month size has shoulder and underarm snaps plus a side/bottom zip with zip-click and can be opened out flat for easy night-time diaper changes * The zip-click cover stops adventurous little ones from opening their zippers * Conforms to US, British and European standards for baby sleep bags