It is called a Croc Top, and has been great when out in the sun and the rain. A bit noisier as the engine noise sounds are a bit louder. It is attached to the lift box so can open into a wide yawn when raising the box.
I've had it for 13 years now, and the 4x2 hasn't skipped a beat, nor lost a pound of air in the tires, but is on the second battery. I use it a lot in the woods and around the 22 acres. The grand kids give it unrelentless attention behind the wheel. Here is a 2001 pic.
See ya later!