MODULAR AND STACKABLE - Each kit includes 6 HDPE panels that are interlocking and stackable. Stack them higher for deeper rooted plants. DURABLE CONSTRUCTION - Made of High-Density Polyethylene that will not crack, rot, warp, or splinter like traditional wooden garden beds. The outer wall is finished in a wood grain design to resemble real wood. EASY ASSEMBLY - The tool free design sets up in minutes. No tools needed as everything snaps together making gardening a breeze. HEAT RETENTION - The walls will absorb heat from the sun and help retain warm temperature needed for your plants to develop strong roots. 5 YEAR WARRANTY - Quality you can rely on with a manufacturer's limited 5 year warranty.