Versatile under-bed space meets a variety of needs-Full-length guardrail creates a safe sleeping environment-4-step ladders make it easy to climb onto the upper bunk-Max 6 inch twin mattress is recommended for safety concerns-Strong metal slat support eliminates the need for a box spring -Heavy-duty metal frame with reinforced structure boasts 485 lbs weight capacity-Stable construction and firm bolted connection for longer service life-Non-slip foot pads provide floor from scratches-Space-savin