Metal shelving units, particularly those made from heavy-duty steel, are the most durable for garages. They can support high weight capacities and withstand harsh environments, including temperature fluctuations and moisture. Wire shelving allows for ventilation and helps prevent dust buildup. Some plastic shelves are also suitable for garages if they are reinforced and have high weight ratings. Adjustable metal shelving offers flexibility for storing various tools and equipment. Look for rust-resistant finishes and units that come with anchor kits for added stability.