Stockholm Solid Wood Bamboo Platform Bed Frame, King-size, Black Finish No box spring or mattress foundation needed Can be used with both conventional and futon mattresses as well as memory foam mattresses Exceptionally durable with Bamboos stronger than steel yet lightweight strength making the Stockholm the strongest bed frame in its class Bamboo is very green with its high sustainability due to less than 5 years to maturity versus 20 years or more for most other woods Metal to metal side rail brackets facilitate easy assembly and durability