From their announcement:
Dirt Planet Game Mats: After a few months in the works, these game mats are now available. Dirt Planet mats are specifically designed for those gamers who want to play on a Mars like environment, but not like the traditional red Mars gaming mats. Dirt Planet mats are designed to resemble NASA photos of Mars, but could be any planet in any distant star system. These mats are available with or without craters, and with or without hex/square grids.