Need for a twin mattress for a first grade student

A student is in need of a new mattress for his bedroom.  This was a wish list item for Christmas we are hoping to fulfil this request so the parent can spend funds on some fun gift items for the student.
Found a suggested item on Amazon, which would allow for easy delivery since the item comes in a manageable box:
A suggested Link to mattress:   It does not have to be this mattress that is purchased, it could be any twin sized mattress.