517eb1a1_Toppers___BedBathandBeyond_com__What_it_s_for
[Mattress Topper Type] Fiberbeds and Featherbeds [What it's for] 
These mattress toppers are essentially mattress-sized pillows designed to create a more comfortable sleeping surface. Fiberbeds and featherbeds cradle body areas that don't come into contact with the mattress. These stuffed pads are made with natural materials like down and cotton or with man-made materials, and can be placed underneath or on top of a fitted sheet.
Buying Guide to Mattress Pads & Toppers - BedBathandBeyond.com
What it's for