1.   I find I sleep better on a firm mattress.

2.   I like to sleep on a firm mattress.

3.   Most doctors recommend sleeping on a firm mattress.

4.   Firm mattress.

5.   Kemp said the safest sleeping surface for infants was a firm mattress covered by a tight-fitting sheet.

6.   The elegant but comfortable decor runs to English antiques, hushed color schemes, original artwork and wonderful featherbeds that top firm mattresses.

7.   --Use a firm mattress, and make sure the child is sleeping on her back or side.