Power Tracks are rubber track systems designed for various types of road trucks, including the Jeep 4x4. They are designed to help with off-road driving in snow, ice, mud, and any other terrain that might otherwise be challenging for your Jeep.
Another great option is a Dominator Track System, which is sold via American Track Truck. This system is significantly more pricey at almost $10,000 but is also considered to be a top-of-the-line option for drivers planning to brave extremely rough terrain. Depending on the difficulty of your off-road adventure, the Dominator Track System might be a good option.