Mid Sleeper Beds A mid-sleeper's mattress is similar to a high sleeper, but it's a little lower and has an easier ladder. These beds are great for small children or rooms with limited space. Mid-sleepers come with a wide variety of design options including shelves, desks or even tents. Look https://www.bunkbedsstore.uk/products/avalon-midi-sleeper-bunk-bed-single-size