lovely  mattress - soft cover, but firm for good support, thicker than expected which we  felt was not ideal for a bunk bed, but  still overall very good. A previous review mentioned an odd smell - we  certainly  can not  confirm this.  Seems  very  good  quality  to me -  we ll serif  it stands the  test of time... from impression so far I think it will 
Size range is  excellent  -  it was the only one available for  short  bunk bed