Wooden windows - on the up side they keep the rain out, sun out and protect the truck on the bad side you can't see out of them.

Have you ever seen a bench made out of shotgun shells?  I bet it gets hot when in the full sun.

Gotta protect yourself from the sun's bright rays!

Works great for keeping the sun out but as soon as it rains you're so screwed!

"I found this swing in the weeds around the house but it needed a sun visor so I made one with pvc pipe a sheet and a few zip ties...