This is the coolest one I've seen/had yet. it is canvas and has a bottom you can velcro in and a top you can zip on/off. if also has two zip open doors. Perfect for outside & inside. I found it at Petco the other day & love it!!! May not be the best for jumpers though, unless you put the cover on. It also comes in a canvas carry bag and folds very flat. the bag even has shoulder straps for carrying!! LOVE it!!
WARE Deluxe Pop-Up Playpen at PETCO