★This bed is "customer assembled furniture"★ For "customer-assembled furniture," we ask that customers unpack, assemble, and install the product themselves. Low bed, semi-double, futon, thin and lightweight bonnell coil mattress included, semi-double bed For children and adults. You can use it forever. Feel safe with a low bed! Even when your child starts sleeping alone, you may still be worried about them falling. This bed is a low bed, which means it is low in height and very comfortable. Children's rooms, which tend to feel cramped, can be made to feel less oppressive and more spacious by installing low beds. You can use a futon. Of course you can also use a mattress. A normal bed is designed to be used with a mattress. Therefore, if you use a futon, there are concerns that the floorboards may break through and it may not be strong enough. This bed has been improved so that you can use a futon! You can use your own futon!