The Minute Dome Pro. Air 1 Ground Sheet is designed to add a layer of protection between the tent and the ground. Use the water-resistant Minute Dome Pro. Air 1 Ground Sheet to prevent a damp tent floor and for an added layer of insulation from the cold ground. Pair the Minute Dome Pro. Air 1 Ground Sheet with the Minute Dome Pro. Air 1 for a layer of ground protection.