Mattres or Mattress: How To spell?
The word Mattres is misspelled against Mattress, a noun meaning "A mass of interwoven brush, poles, etc., to protect a bank from being worn away by currents or waves."
Mattress has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  mattre-s  Correct Spelling:  mattre-ss 
Explore spell check of Mattress to spell without errors.