well its really concrete, but its mixed with the native dirt so it still counts lol! actually paul (the builder) designed them to be sort of inserted into dirt jump packs and back-filled behind the lip with earth as a way to make permanent dirt jumps who's lips dont erode over time but still look like the dirt. genius!

 ha ok thought so.. exactly what they've done in many of the skate-parks in the U.S., specifically in Colorado.. same reddish hue. I love it, make sure to get a few photos without any fill just for phantom lip sake!.