Mid Sleeper Beds A mid-sleeper's mattress is similar to the high sleeper, however it's a little lower and has a shorter ladder. These are great for younger children or when your bedroom has limited space. Mid-sleepers come with a variety of features, including shelves, desks and even tents. Look over https://www.bunkbedsstore.uk/products/mid-sleeper-bunk-bed-with-slide-stairs-guardrails