The new Catch Cover glow sleeves are the perfect addition to your ice shack, especially if you like to fish in the dark. This 9" sleeve illuminates your hole and is easily recharged in sunlight or with a flashlight. Perfect for the wee hours of the morning when your rattle reel goes off. Catch Cover sleeves feature a custom fit flange for use in your round or square fish house holes. They isolate your fishing hole from the elements creating a barrier that keeps out cold and blowing snow, holes stay open longer and your shack stays warmer. Built with injection molded cold resistant plastic they are built to last and feature a limited lifetime guarantee. The best ice shack system in the world, make your shack more functional.