This Voksi City North sleeping bag combines natural wool and high-quality down to deliver reliable warmth through autumn and winter. This features a wool back that helps regulate temperature and a soft cotton inner fabric that is comfortable for a baby to lie on. This uses 80% down/20% feather filling and a unique box construction to trap insulating air and block cold, while a windproof nylon outer with a minimum 8000 mm water column and BIONIC-FINISH®ECO coating offers strong water repellency. This fits all strollers and is compatible with 5-point harnesses for easy everyday use; during heavy rain, add a rain cover and ensure sleep is supervised with ample airflow around the head.