The hole freezing over is a common question we do get about our sleeves. Obviously putting a cover over the hole does restrict air flow in your holes so we always recommend that users of our product put a small fan on the floor in the back and/or front of the house. This will circulate the air on the floor and actually create the air flow needed to keep your holes open. We have been on the lake for 4+ days at a time in subzero temps without ever cleaning out a hole.
Whether you sleeve or not, packing the sides under the house with ice and slush, using wheel shirts, banking/frame skirts, or sleeve insulators are additional steps that should be taken to reduce the cold air that gets under your house.
Our cover is the strongest in the market and has so far been tested up to approximately 700 pounds of weight without breaking or slipping out of the sleeve. Our covers are made of lexan and the sleeves are high density plastic, make it a very durable product. We are also the ONLY sleeve that universally fits both Catch Cover and Fish Hole Buddy floor rings with the use of our Accessory Clips if you have Fish Hole Buddy.
We sold three times more than we expected last year, and are expecting another big year this year as we have expanded into more dealerships as well as Cabelas and Runnings. A portion of each sleeve sold also goes to support Minnesota Band of Brothers Outdoors.