Mid Sleeper Beds A mid-sleeper's mattress is similar to the high sleeper, however it's lower and usually has shorter ladders. These are perfect for young children or rooms with limited space. Mid-sleepers are available with a range of design features, such as shelves, desks and even tents. Check the product https://www.bunkbedsstore.uk/products/kimbo-anthracite-grey-wood-mid-sleeper-bed