This is the one I have:
SeaBreeze Petite Pens - A lightweight solution to heavy exercise pens
I've had it for about 9 years. It's especially great for travel because it is very lightweight. Columbo's breeder recommended it when we got him because she uses it when traveling for shows. We use it instead of a crate when needed. You can also stretch it out and block off rooms, doors, etc. I also use it sometimes to block the open part across the steps on our covered front porch and block him in. It has vinyl protectors on the top and bottom to protect the floors.