Off-road vehicles are built to tackle the toughest terrains, from rocky mountains to deep mud and sandy deserts. These cars, such as the Jeep Wrangler and the Toyota Land Cruiser, feature high ground clearance and heavy-duty suspension systems. Four-wheel drive (4WD) is an essential feature, allowing power to be sent to all wheels for better traction on slippery surfaces. Specialized tires with deep treads provide the necessary grip to climb steep hills or navigate through water crossings. Protection is also important, with many off-roaders installing skid plates to protect the underbody from rocks and damage. For many people, off-roading is a lifestyle that involves camping and exploring remote areas where paved roads do not exist. Reliability is the most important factor for an off-road vehicle, as a breakdown in the wilderness can be dangerous.