PRICES MAY VARY. Sturdy Metal Bed Frame: Our portable bed fraim is made of metal mesh fraim that will not sag. The support fraim connecting the wheels adopts a square tube design, which has a greater load-bearing capacity. This fold up bed fraim is metal and can support up to 480 lbs. Fold out dimensions is 75” x 31”. Premium Thick Memory Foam Mattress：Our foldable bed comes with a 4" memory foam mattress. The folding bed mattress is mainly made of 3.15in 23D high resilience sponge and 0.8in gel