Mid Sleeper Beds A mid-sleeper's mattress is similar to the high sleeper, but it's a little lower and has an easier ladder. They are ideal for small children or rooms with limited space. Mid-sleepers come with a variety of features, such as desks, shelves, and even tents. Check the product https://www.bunkbedsstore.uk/products/children-s-pine-bunk-bed-3ft-single-heavy-duty