This project is dead simple. The only supplies needed are a king size foam mattress topper, a black marker, and that electric carving knife you only pull out of the drawer once a year at Thanksgiving.

We picked up a 2″ king size foam topper from Target. I almost went with the 4″, but I wasn’t sure if our fitted sheet would still fit.

Then I just set our V-berth cushions on top of the foam and marked the edges with a black Sharpie marker.

I then retreated back into the air-conditioned cabin and pulled out the electric carving knife. When it comes to cutting foam, these things are magical. It saws right through it with no trouble.

Then I just popped the now V-shaped foam topper into the V-berth, and we’re ready for a much more comfortable sleep.

We even had enough material left to cut a couple pillows as well.