Roomy and practical: Hjalmar is the ideal sleeping bag if you don’t want to be sleeping in a tight cocoon. It allows your entire body to move during your sleep and can be converted into a blanket or zip two bags together to create a double bag. The all-round zipper allows you to adjust the heat and ventilation during the night to fit your exact needs. Hjalmar is available in a summer and a 3-season version depending on how much insulation you require. Both bags have an integrated zipper baffle which prevents the cold from escaping through the zipper.