Lifetime 4-Foot Essential Folding Tables are constructed of high-density polyethylene and are stronger, lighter, and more durable than wood tables. The innovative nesting design allows tables to fit snuggly together, and helps keep stacked tables straight and sturdy. This ingenious architecture saves 20% on the stacking height compared to previous models. Our tables are UV-protected with all-weather construction for both indoor and outdoor use. The patented steel frame design provides a sturdy foundation and is protected with a powder-coated, weather-resistant finish.