Dive summary: 

• As a part of a switch to Serta mattresses and box springs, Hilton Hotels across the U.S. plan to send 85% of the old mattresses to be recycled.
• In the past two years alone, Hilton has purchased more then 50,000 matresses.
• The mattresses parts will be used to produce tools, automobiles, pressed wood products, oil filters and carpet padding amongst other things.

From the article: 

Hilton Worldwide announced a new mattress recycling program in coordination with the installation of new Serta mattresses and box springs. Available immediately across all brands in the U.S., the program will recycle approximately 85 percent of our hotels’ mattresses and box springs into various products rather than being diverted to a landfill. ...