Mid Sleeper Cabin Bed With Desk A mid-sleeper cabin mattress is the ideal solution to transform a child's space into a functional and fun space. These bed frames, also known as lofts or high sleepers can be used for studying and sleeping with a convenient pull-out desk and plenty storage. https://www.bunkbedsstore.uk/products/white-cabin-bunk-bed-for-kids-solid-pine-wood