I chose this mattress when I was buying a twin over full bunk bed set for my young Granddaughers - this was the mattress they had on the display model in the store, as soon as I laid down on it to test it out, I was hooked! 
So comfortable and perfect without a box spring underneath! It arrived rolled up in a bag, and unrolled perfectly! The removable mattress cover that comes with it is super-soft, and is machine washable. For the price and the quality, highly recommend to all!