The Crua Outdoors Hammock Culla Thermally Insulated Outer Shell works with almost any Hammock including Crua own brand hammocks. The Crua Outdoors Culla Hammock has climate-controlling materials which will keep you cool in the summer but warm in the winter. The Crua Culla Hammock can also be used as a poncho, an under quilt or an over quilt serving multiple purposes. This will enhance your Camping experience and bring new levels of comfort from what you know, which is what we here at Crua Outdoors strive to achieve. The Hammock Culla is the perfect hammock accessory. It is an insulated outer shell which wraps around your hammock and uses our Insulation Technology and retains your body heat within its inner walls. It keeps you warm in the winter and cool in the summer. The perfect Hammock Overquilt and Hammock Underquilt.