I have that cover too I'm sure it is made by BAK for ford. For the custom tonneau option. It's pretty wicked as it sits between the Bed rails. Only thin I don't like is having to fold it against the window for the full box. But not much else you can do with a hard cover.
I know it is kinda wierd how it works when fully open, but i was thinking about also getting the inside the bed line-x 'ed and under the truck. so will probley have to take it off to have that done.
F150Ecoboost.net is the best Ford F150 Ecoboost Forum with discussions on 2011+ F150 Ecoboost Trucks. Discuss performance mods, towing questions, wheels, tires, lift kits, and much more!