Description of Bibler Tents Eldorado/Lighthouse Ground Cloth To provide protection and water resistance, Bibler offers their Bombshelter Ground Sheet as an option with the Bombshelter tent. A durable and strong ground shelter for your tent, the Ground Sheet is made from coated 70 denier nylon taffeta to minimize wear and tear on your tent. Reinforced grommets along the sides allow you to easily use the ground cloth as a tarp. Handmade with the same painstaking attention to detail as their line of tents, it's an accessory almost a necessity.