1/4" MDF, Dark Grey Auto Carpet, used 3M Super 77 spray adhesive, Nylon Cable Clamps to attach bottom board and keep it from slipping, 2 Striker Plates from 94-97 honda civic (trunk latches), couple of screws/washers/nuts
1. Its thin, so dont recommend someone sitting on it.
2. Yes its carpet similar to speaker box material.
I saw the template online, but seemed a bit much just for a template. I work with wood all the time so this was a pretty easy. The main problem was the bottom board since its curved/slanted to make it fit in the back.
Sources:
1/4" MDF------McCoys Lumber $12.99 still have plenty left, Lowes was double the price and for less lumber
Striker Plates - $5.50 each from Salvage yard, can be found cheaper, I was in a rush
Hardware (Screws/Washers/Nuts/Nylon Cable Clamps) -----Harbor Freight $10.00 or less
Carpet---Local Supplier $20.00 for 3 yds by (56in wide I think)
Super 77 ---Lowes $10ish, 1 can is enough