Poly Cover, Steel Frame and Solid Wood Legs GOOD DESIGN AWARD WINNER - Awarded by the Chicago Athenaeum Museum of Architecture and Design in 2019 for innovative design and assembly EASY ASSEMBLY, ZIP-FREE COVER - features bolt-free Quick Snap assembly for convenient and quick set-up; hooks and elastic loops hold the cover in place; all tools, parts, and instructions included in one smartly shipped box NO BOX SPRING NEEDED - rest your memory foam, latex or spring mattress directly on top of this foundation for excellent support and extended mattress life MULTIPLE COLORS AND SIZES - offered in an array of colors and extended sizes to suit any room size or home interior Worry-free five-year limited warranty included; mattress sold separately