We purchased this mattress for our daughter’s bottom bunk bed. 
Initially I was shocked at how small it looked in the delivery box, however once opened the mattress inflated and fits perfectly on the bottom full bunk bed. 
The mattress is firm yet soft and comfortable at the same time. 
We did place a waterproof mattress protector on to keep the mattress clean and minimize accidents. This is the 3rd mattress we have ordered from Wayfair and we have not been disappointed.