What's the weight limit for the mattress? October 31, 2018 11:58 Updated Follow The maximum weight per sleeper is 18 stone (114kg) for our adult Hybrid® mattress. The Simba Hybrid® Bunk Bed Mattress has a weight limit of 15 stone (95kg). Related articles How sturdy are they and what is the weight limit? Will I feel my partner move around at night? Do I still qualify for the 100 night trial if I paid using financing? How deep is your mattress, will my sheets fit? How does the 100 night trial work?