I put a topper on my truck mainly to use for sleeping in it. It's a medium rise (6" above cab height). It gives me enough headroom with my cot. I added a Bedrug liner for added insulation. I have slept in in down into the teens without a heater. An extra wool blanket over my sleeping bag keeps me warm enough. I gave up on pitching a ten a few years back. This works just fine for weekend hunting trips.