As a roomy, six-sided thermal hub shelter, the C-890 Thermal is the perfect ice fishing shelter for groups or families wanting to spend a day on the ice in comfort! As part of Clam’s C Series of hub shelters, it pops up in about 60 seconds. And with the toughest, most durable poles and hubs in the outdoors, the C-890 is built to withstand extreme conditions. Fish in comfort, fish longer, and put more fish on the ice with the C-890 Thermal Hub.