Abstract: A sleeve configured to be disposed substantially within an ice fishing hole, including a cylindrical body member having a top aperture, a bottom aperture, an interior surface, and a tapering exterior surface, such that an exterior diameter of a top portion of the exterior surface is larger than an exterior diameter of a bottom portion of the exterior surface. The exterior surface of the cylindrical body member includes a hydrophobic layer. The sleeve includes an L-shaped flange extending as a ring outwardly from a region between the top portion and bottom portion of the exterior surface of the cylindrical body member, thereby preventing the sleeve from falling through the ice fishing hole and thereby substantially covering the ice fishing hole. The sleeve includes a cover member sized and shaped to fit over the top aperture of the cylindrical body member.